An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
José Ricardo Tavares de Albuquerque; Hamurábi Anizio Lins; Manoel Galdino dos Santos; Márcio Alexandre Moreira de Freitas; Fernando Sarmento de Oliveira; Almir Rogério Evangelista de Souza; Lindomar Maria da Silveira; Glauber Henrique de Sousa Nunes; Aurélio Paes Barros Júnior; Paulo Fernando de Melo Jorge Vieira
Glycine max; cultivars; genotype-environment interaction; grain yield; phenotype; soybeans; Brazil
Abstract:
... Soybean production in Brazil is concentrated in the central and southern regions of the country, although expansion is occurring toward the northeast, where semi-arid conditions are predominant. There is little information on the behavior of soybean cultivars in semiarid climates; therefore, the objective of this study was to evaluate the interaction of soybean genotypes by environment, adaptabili ...
analysis of variance; climate change; cluster analysis; cultivars; drought tolerance; durum wheat; early development; genetic traits; genetic variation; genotype; genotype-environment interaction; grain yield; human population; provenance; tetraploidy; water stress
Abstract:
... Expanding the genetic basis of modern wheat cultivars may improve yield stability and increase grain yields under climatic changes, to feed the growing human population. The main objective of this study was to evaluate the potential for incorporation into a durum wheat breeding program of 64 accessions of tetraploid wheats from six sub-species of Triticum turgidum, tested under rainfed (terminal d ...
... Legumes are important in sustainable agriculture and particularly so when they are intercropped with other species. In breeding programs, little attention is paid to their agronomic performance in species mixtures. In red clover, improved persistence is an important breeding goal. We identified traits associated with survival of red clover cultivated in pure stands (PS 3) or in mixtures with grass ...
... Stem rust, caused by Puccinia graminis f. sp. tritici (Pgt), poses a threat to wheat production in South Africa (SA). Winter wheat cultivar PAN 3161 displays a high level of resistance to stem rust in the field, prompting an investigation into the genetics thereof. An F₂ population developed from a cross between PAN 3161 and the susceptible parent Line 37-07 was tested against Pgt race PTKST in th ...
... Grain weight (GW), one of the yield components of rice (Oryza sativa L.), is an important trait for improving rice productivity. In the 1990s, New Plant Type (NPT) rice breeding focused on improving the yield potential of rice varieties by introducing unique traits from Tropical Japonica Group cultivars. To reveal the genetic factors responsible for yield-related traits of NPT varieties, we previo ...
... This study was aimed to differentiate parental genomes, examining intergenomic composition, and mapping mitotic metaphase chromosomes by localizing parental and 18S rDNA probes in seven interspecific hybrid progenies that originated from Lilium longiflorum. Since single method of in situ hybridization has been widely used in interspecific lily breeding, while in this study, flow cytometry was used ...
... Fusarium wilt is among the major soil borne fungal diseases hindering sweet potato production in temperate regions of the world. Resistant cultivars are important for commercial production as the impact of Fusarium wilt is aggravating due to intensifying climate variability, thus the need for quick screening methods. The objectives of this study were to test a quick screening method at the early g ...
Rodrigo S. Silva; Josias C. Faria; Adriano M. Knupp; Marcelo S. Aguiar; Helton S. Pereira; Amanda L. Ferreira; Antonia L. M. Zaidem; Patrícia V. Pinheiro; Leonardo C. Melo; Thiago Lívio P. O. Souza
... The most important viruses infecting common bean (Phaseolus vulgaris L.) in Brazil are BCMV, BGMV and CPMMV, the last two transmitted by the whitefly Bemisia tabaci occurring simultaneously and causing severe yield losses. Embrapa has previously developed a genetically modified common bean cultivar carrying the 5.1 transgenic event for resistance to BGMV, which is commercially available. This cult ...
... Garden asparagus (Asparagus officinalis L.) is a dioecious species, with male [XY] and female [XX] individuals. Since male individuals are preferred over females for agricultural production, all-male cultivars have agronomic advantages over mixed-sex cultivars. To produce an all-male cultivar, it is important to obtain a supermale [YY]. Given their morphological similarities, males and supermales ...
... The influence of Fusarium wilt in lettuce (Lactuca sativa L.) is becoming increasingly severe under the influence of global warming in tropical and subtropical regions. Previously, we reported on the development of a PCR-based marker, LG1_v8_116.506Mbp, on LG1 for the resistance to Fusarium wilt race 2. This study investigated genetic resources with novel resistance to race 2 using molecular marke ...
... Combining improved grain yield and end-product quality in durum wheat has become an essential priority for Moroccan breeding programs due to their significant effect on the country's agricultural economy and social system. Landraces and cultivars of distinct germplasm pools constitute an untapped source of genetic variation for durum wheat improvement. To this end, a mixture of genotypes consistin ...
Triticum aestivum; analysis of variance; chlorophyll; cultivars; drought tolerance; genetic variation; heat; leaves; principal component analysis; proline; water stress; wheat
Abstract:
... Wheat (Triticum aestivum L.) is predominantly growing in areas where terminal drought stress is the foremost yield-limiting factor. Since genetic variability for drought tolerance is weakened in modern wheat cultivars, exploring the drought tolerance potential of the synthetic backcross-derived wheat lines (SBL) might help to widen genetic diversity for wheat breeders. The variation among 45 selec ...
... Reduced height (Rht) genes are widely used in modern wheat breeding although some confer higher susceptibility to Fusarium head blight (FHB) caused by F. graminearum and other species. Our objective was to test whether the recently identified Rht24b dwarfing allele has a neutral effect on FHB response as reported previously from a single mapping population when unrelated winter wheat cultivars wer ...
... Egypt is considered one of the centers of cultivated lettuce (Lactuca sativa L.) domestication. However, traditional Egyptian lettuce landraces and their sympatric wild relatives have not been comprehensively described. We assembled a set of 35 lettuce samples from Egypt (landraces of L. sativa Cos and Oilseed types plus L. serriola L.), and compared them with a set of European L. sativa germplasm ...
Fernanda Cupertino Rodrigues; Francisco Charles Santos Silva; Pedro Crescêncio Souza Carneiro; Luiz Alexandre Peternelli; Leonardo Lopes Bhering; Felipe Lopes da Silva
Glycine max; cultivars; genotype-environment interaction; soybeans; Brazil
Abstract:
... Genotype × environment (GE) interaction can difficult soybean breeding programs to achieve the aim of more productive cultivars. Environment stratification is a way to circumvent this problem. However, multiyear data studies are difficult to work with, because they are, usually, unbalanced. GGE Biplot is an efficient method to find mega-environments, however, it allows for, at most, 30% of the unb ...
... Most agricultural soils worldwide have limited availability of phosphorus (P); thus, crops require supplemental application of P fertilizers. Due to the economic and environmental concerns derived from the use of P fertilizers, identifying and breeding P-efficient lettuce (Lactuca sativa L.) cultivars is imperative for the reduction of production costs and implementation of more sustainable practi ...
Pedro Thiago Medeiros Paixão; Ana Carolina Campana Nascimento; Moysés Nascimento; Camila Ferreira Azevedo; Gabriela França Oliveira; Felipe Lopes da Silva; Eveline Teixeira Caixeta
... Brazil stands out worldwide in the production of coffee. The observed increases in its productivity and morpho agronomic traits are the results of the improvement of several methodologies applied in obtaining improved cultivars, among which the predictive methods of genetic value stand out. These contribute significantly to the selection of higher genotypes, increasing the genetic gain per unit ti ...
... Experiments were conducted to study genetics and combining ability for yield and its attributes under Irrigated (E1) and Rainfed (E2) conditions using F1 hybrids derived from Line X Tester mating design by crossing eleven lines with three testers. Significant differences were observed among all the genotypes for all the traits in both E1 and E2 environments. The σ²gca/σ²sca ratio indicated the pre ...
Cowpea aphid-borne mosaic virus; Passiflora edulis; agronomic traits; analysis of variance; cultivars; disease progression; passion fruits; prediction; recurrent selection; Brazil
Abstract:
... In Brazil, the passion fruit woodiness disease is caused by the cowpea aphid-borne mosaic virus (CABMV). It is considered one of the most economically important diseases in the passion fruit (Passiflora edulis Sims). This study aims to implement the recurrent selection to develop passion fruit cultivars resistant to CABMV and with good agronomic performance. The experiment was led in Campos dos Go ...
amylases; brown rice; cultivars; genetic improvement; grain quality; nutrition; protein content; staple foods; China
Abstract:
... Rice is the most staple food consuming in China. During the past six decades, a large number of indica inbred rice cultivars have been developed. However, seldom studies have focused on evaluating the dynamic changes of grain quality improvement among the major cultivars. Our study evaluated the genetic improvement of 12 quality traits in indica inbred rice cultivars developed in rice breeding pro ...
agricultural research; cultivars; early development; fruit weight; fruit yield; fruiting; genetic improvement; peaches; phenology; syrups; Brazil
Abstract:
... The peach is a traditional crop in the south of Rio Grande do Sul State, Brazil, where 35 million to 50 million cans of peaches in syrup are produced annually. All the raw materials for the peach canneries come from cultivars originated from the peach breeding program of the Brazilian Agricultural Research Corporation (Embrapa Temperate Agriculture), which started before the establishment of Embra ...
... Sheath blight (ShB) caused by Rhizoctonia solani is one of the serious constraints that hamper global rice production. It causes severe yield loss of up to 69% under favorable environmental conditions. The application of chemical fungicides remains the primary approach for the management of this disease. But, overuse of chemical fungicides causes potential health and environmental risk. The use of ...
... The peanut rich in oleic acid in seed oil, also known as high oleic peanut, renders its products superior in human healthy diet, long shelf life and high oxidative stability in food and oil processing. High oleic peanut varieties in China are derived from a handful of high oleic donors with limited genetic background. Improvement of high oleic peanut cultivars by integrating key target traits is c ...
... Cowpea is one of the most important indigenous food and forage legumes in Africa. It serves as a primary source of protein for poor farmers in drought-prone areas of Ethiopia. The crop is used as a source of food, and insurance crop during the dry season. Cowpea is adaptable to a wide range of climatic conditions. Despite this, the yield of the crop is generally low due to lack of stable and droug ...
... This study estimated the genotype × environment interactions for ten yield associated traits in advanced generation hybrids of several cultivars of common wheat (Triticum aestivum L.) with Aegilops kotschyi Boiss. and A. variabilis Eig. using the additive main effects and multiplicative interaction (AMMI) models. Tests were ran over five years at one location in replicated field trials. The AMMI m ...
Aphis glycines; cultivars; genotyping; germplasm; haplotypes; resistance genes; soybeans; China
Abstract:
... The soybean aphid is one of the main damaging pests of soybean. Host resistance can effectively reduce the loss caused by the damage of soybean aphid. There are abundant soybean germplasm in China, however, few aphid resistant soybeans were identified and genetic backgrounds of them were poorly characterized. In this study, 22 soybean accessions with high soybean aphid resistance (resistant rating ...
Oryza sativa; RING finger domains; chromosomes; cultivars; genome-wide association study; grain yield; growth and development; haplotypes; inbred lines; lead; panicles; quantitative polymerase chain reaction; rice; sequence analysis; Asia
Abstract:
... Panicle length is an important trait for improving panicle architecture and grain yield in rice (Oryza sativa L.). Two populations were used to identify QTLs associated with panicle length. Based on genotypic data including 788,396 single-nucleotide polymorphisms (SNPs), twenty eight lead SNPs significantly associated with panicle length in 2018 and 2019 were detected on chromosomes 1, 2, 3, 4, 6, ...
... Crossbreeding within narrow genetic resources increases the homozygosity of the offspring. Resultant inbreeding depression can reduce the yield potential of the offspring. Slow progress in breeding programs because of inbreeding has been suggested in persimmon (Diospyros kaki Thunb.), but quantitative evidence has been limited. Here we assessed how inbreeding affects a population’s yield-related t ...
Colletotrichum lindemuthianum; anthracnose; beans; chi-square distribution; cultivars; genetic variation; landraces; mature plants; pathogens; recessive genes; seedling emergence; seedlings; Andes region
Abstract:
... Anthracnose has remained one of the biggest hurdles in improving the productivity of common bean owing to the wide cultivation of the host and higher genetic variability among the pathogen. Hence newer mechanisms of resistance are being explored for developing cultivars with improved yield as well as resistance against the pathogen. The present investigation reports the discovery of the dynamic ph ...
... French bean is one of the most important staple foods in many parts of the world. Among several bacterial, fungal and viral diseases, anthracnose caused by Colletotrichum lindemuthianum is the most widespread and severe disease of French bean. Therefore, the present study was undertaken as prebreeding effort with the objective of introgression of important bean anthracnose resistance gene Co-4 in ...
Coffea canephora; cultivars; employment; ex situ conservation; gene pool; genetic erosion; genetic improvement; genetic stability; hybridization; income; males; open pollination; pollen; Central Africa; Cote d'Ivoire
Abstract:
... Robusta coffee (Coffea Canephora) is an important source of income and employment, contributing significantly to the economies of many developing countries. This species is split into two genetic groups: Guinean and Congolese. Côte-d’Ivoire is the primary diversification center of the Guinean pool, which offers great potential for genetic improvement. However, genetic erosion of this group is curr ...
... The development of hybrid cultivars is one of the most important contributions of a breeding program. A high allelic fixation of the parent lines is essential to guarantee the uniformity of developed hybrids. In this sense, papaya segregation has been observed in the parent lines, impacting the pattern of the hybrids obtained and, consequently, their commercialization. Thus, this study aimed to ev ...
... Biotic stresses cause severe yield reductions in rice and are a threat to global food security. Developing resistant cultivars is the most affordable and sustainable approach to handling different biotic stresses. CO43 is an elite rice variety of Tamil Nadu susceptible to gall midge (GM) and bacterial blight (BB). In this regard, the current research was carried out to pyramid a major BB resistanc ...
... The objective of this study was to identify the aptitude of sweet potato genotypes derived from botanical seeds and select them for the aptitudes human consumption, ethanol production, and animal feed through separate indices. A row–column incomplete block design was used, restricting relatedness in the draw. A total of 1604 half-sib genotypes resulting from recombination of 55 clones from the ger ...
... Plasmopara viticola is the oomycete that causes downy mildew in grapevines. Varying levels of resistance to P. viticola across grape cultivars allowed quantitative trait loci to be identified. The Rpv3 locus is located at chromosome 18, in a region enriched in TIR-NBS-LRR genes, and the phenotype associated is a high hypersensitive response. In this work, we aimed to identify candidate genes assoc ...
... Leaf rust caused by Puccinia triticina Eriks. is the most prevalent wheat rust worldwide and occurs annually wherever wheat is grown. The most economical and environmentally friendly method to control this fungal disease is genetic resistance, which is achieved through deploying effective resistance genes. Tightly-linked molecular markers facilitate gene tagging and their deployment with other res ...
Allium cepa; bulbs; chlorophyll; cultivars; drought; gas exchange; greenhouses; homeostasis; leaves; malondialdehyde; onions; plant growth; salt stress; temperature; toxicity; water stress
Abstract:
... Abiotic stresses deteriorate plant growth resulting in devastating yield losses. Salt stress solely cause ionic toxicity and disturbed homeostasis, whereas combined salt and drought stress has more pronounced effects on plants. This study aimed to screen 32 Turkish onion breeding lines and commercial cultivars based on their morpho-physiological and biochemical responses after exposure to drought, ...
... Participatory plant breeding and rapid sensory evaluation are effective techniques for organic cultivar development. Table beet is an important crop for organic growers, and geosmin, a volatile compound which confers earthy aroma, has been suggested as the attribute around which hedonic liking of beet is organized. Open pollinated table beet populations with diverse pigmentation and low (LGC) or h ...
... The aim of this study was to investigate the potential of heterogeneous composite cross populations (CCPs) to increase sustainability and resilience of wheat cropping systems, a so far largely neglected approach. For this purpose, 10 CCPs originating from one CCP created in 2001 and having evolved under different environmental conditions since the F₅, were compared in the F₁₅ and F₁₆ with 10 recen ...
Cucurbita moschata; chromosome mapping; consumer acceptance; cultivars; fruit morphology; fruit quality; fruit weight; fruits; genetic distance; market value; pleiotropy; pumpkins; vegetable crops
Abstract:
... Pumpkin is a popular vegetable crop and exhibits a broad diversity in fruit shape and size. Fruit-related traits are the decisive factors determining consumer acceptance and market value of pumpkin cultivar. As a result, deciphering the genetic basis of fruit-related traits is of great importance for pumpkin breeding. To address this problem, a F2 population was generated by two Cucurbita moschata ...
... Grain yield is a quantitative trait, which is determined by several agronomic traits. Unfortunately, there is little information about the genetics behind yield components in US rice cultivars. The objectives of the present study were to (1) conduct a QTL study to identify chromosome (chr. hereafter) regions associated with yield traits in two U.S.-developed rice cultivars and (2) identify candida ...
Oryza sativa; additive effect; alleles; cultivars; environmental impact; genetic background; homozygosity; linear models; principal component analysis; quantitative traits; rice
Abstract:
... In order to obtain novel information about QTL-by-QTL, QTL-by-environment, and QTL-by-QTL-by-environment interactions (QQ, QE, and QQE, respectively), four loci controlling grain length in rice (Oryza sativa L.), that is, GW2, OsLG3b, and GS3, derived from a large-grain cultivar, BG 1, and LKF, from another cultivar, Fusayoshi, were targeted as a model system of quantitative trait. First, four sin ...
... Head splitting is a major physiological disease in cabbage. The most effective approach for controlling head splitting is to deploy genetic resistance by breeding cabbage cultivars with stable resistance. However, the genetic mechanisms regulating head-splitting resistance in cabbage remain largely unknown. Here, we employed the whole-genome resequencing-based approach (QTL-seq) to discover genomi ...
... This study proposes a selection strategy to be applied to a large number of coffee accessions, which can be useful when exploring many genotypes in breeding programs for beverage quality. Over three consecutive years, 270 Arabica coffee accessions from the germplasm collection of Minas Gerais, Brazil, were sensorially characterized. At the end of this period, the 20 genotypes with the greatest pot ...
... Seven field experiments were conducted at three experiment stations representing major sugarcane producing regions in Egypt. Each experiment comprised a randomized complete block design with three replications. Fourteen elite breeding lines typical of those routinely generated in the three final selection stages of sugarcane breeding programs in Egypt, along with one check variety (GT54-9) were ev ...
... Overwintering rice can survive through the natural cold-winter field environment, sprout from rice tillering node in the following spring, tiller, flower, seed, and being harvested in the following autumn, which is a type of an extreme case of cold tolerance of rice. The successful utilization of cold tolerance rice is the most economical strategy for the cold tolerance rice cultivar breeding proj ...
corn; cultivars; drought tolerance; filling period; gene expression; gene expression regulation; protein kinases; sequence analysis; signal transduction; transcriptomics; water stress
Abstract:
... Drought tolerance is a very complex trait, controlled by multiple genes, difficult to identify and evaluate in maize. Here, we employed RNA-seq transcriptome analysis to identify key differentially expressed genes (DEGs) responding to drought stress in maize at different crop growth stages. Resultantly, 666, 2417, and 7375 drought-responsive DEGS were detected at the flare, tasseling, and grain-fi ...
... Generally, the relation between quantitative trait loci (QTLs) and yield is empirical, and their roles in source-sink dynamics are unclear. A tomato introgression line (IL) population (S. pennellii ILs) was applied to analyze the effect of chromosome segment from wild cultivar on numerous yield-related phenotypes, including plant yield, the weight of vegetative part, the number and weight of indiv ...
... The bienniality of production and the incidence of pests and diseases, such as coffee leaf miner and coffee leaf rust, stands out among the factors that limit coffee crop yield. Obtaining cultivars with greater stability in production and resistance to these biotic agents are among the main objectives of coffee breeding programs. In this way, biotechnological tools such as Genomic Wide Association ...
... Damage generated by insects is one of main restricting factors for soybean production. Stink bugs are a great threat within pests because, by feeding mainly on pods, they cause direct and irreversible damage to developing seeds. Thus, plant resistance is an important management strategy to reduce insect population impact on yield losses. Association mapping can be used as a powerful tool for disse ...
... Currently, there is demand for high yield soybean cultivars associated with seeds of high physiological quality. The launch of high yield soybean cultivars associated with high quality seeds in soybean is big challenge due to the lack of a straight correlation between agronomic traits and seed quality. The genetic and phenotypic parameters associated with the physiological quality of seeds could h ...
cultivars; fruit acids; genetic variation; germplasm; multidimensional scaling; pericarp; principal component analysis; provenance; seed weight; watermelons; Tunisia
Abstract:
... In Southern Tunisia, local cucurbitaceous genetic diversity is threatened by the introduction of many commercial varieties. In the present study, the genetic diversity of local Tunisian watermelon cultiavrs and two commercial varieties (Giza and Sugar-baby) was studied using morphological traits and RAPD markers. The morphological analysis showed an important diversity among the studied watermelon ...
... A yellow inbred line (SP3B) and a red doubled haploid line (H6) were used to produce a F₂ mapping population of onion (Allium cepa L.). Initially, insertion/deletion and cleaved amplified polymorphic sequence markers were developed based on polymorphisms in the reference transcriptome. To improve efficiency of marker development, RNA-seq was carried out to identify single nucleotide polymorphisms ...
Long Thien Tran; Anh Tuan Nguyen; Minh Hong Nguyen; Long Tien Nguyen; Minh Thi Nguyen; Lai Thi Trinh; Dieu-Thuy Thi Tran; Sang Viet Ta; Ken Hoshikawa; Koichi Sugimoto; Hiroshi Ezura
brix; crossing; cultivars; fruit weight; fruit yield; leaves; mutants; mutation; parthenocarpy; pericarp; pollen; potatoes; self-pollination; tomatoes
Abstract:
... A number of different strategies have been utilized to introduce parthenocarpy into tomato commercial cultivars. In this study, we evaluated three segregating populations (F₂, F₃, and F₄) derived from conventional crossing between iaa9-3 mutant in Micro-Tom and an inbred pure tomato line V62. The mutation caused potato leaf style and high parthenocarpic fruit set ratio (nearly 90%). Introducing ia ...
... Resistance to multiple races of Fusarium wilt is a desired trait in lettuce (Lactuca sativa L.) cultivars, as it is directly related to grower profitability. We focused on its resistance to the race 2 pathogen, and analyzed F₂ individuals obtained from a cross between ‘VI185’ (resistance to race 2) and ‘ShinanoGreen’ (susceptible to race 2) for genetic mapping of its resistance locus. According to ...
... Utilization of resistance (R) genes to breed resistant cultivars is one of the most effective and economical approach to control rice bacterial blight (BB). Xa7, a dominant, broad-spectrum and durable BB-resistant gene, is an ideal gene resource to improve the resistance of rice varieties to bacterial blight, and this well-known gene with important breeding value has been cloned in our recent stud ...
... Emmer wheat (Triticum. turgidum ssp. dicoccum) as an ancestor of bread and durum wheats, can be a potential resource to restore genetic diversity in modern durum wheats. In order to estimate the combining ability, the type of gene action, heritability, and other genetic parameters of agronomic traits, a full diallel cross (12 × 12) was made between eight durum cultivars and four emmer wheat access ...
... Cotton (Gossypium spp.) is an economically important crop which provides a significant source of fiber, animal feed, and food oil worldwide. Bacterial blight (BB), caused by Xanthomonas citri pv. malvacearum (Xcm), infects the aerial part of the cotton plant at all stages and can cause a significant loss in yield and fiber quality. In this study, 288 Upland (G. hirsutum) and 8 Pima (G. barbadense) ...
Alexei de Campos Dianese; Ana Beatriz Zacaroni; Bruno Cézar Pereira de Souza; Ana Paula da Silva Pagani; Nelson Oliveira Pinheiro; Eduardo Monteiro de Castro Gomes; Gisele Abigail Montan Torres; Luciano Consoli; Adalberto Corrêa Café-Filho
... Wheat blast caused by Magnaporthe oryzae pathotype Triticum (MoT) has become an important fungal disease on wheat and is now present in most of the important wheat-producing tropical regions of the world. This study evaluated head blast incidence on the spikes of 281 hexaploid wheat genotypes and two Triticum durum cultivars across three years (2011–2013) in the Cerrado Biome in the Brazilian Midw ...
... With globalization and easy access to information, a consumer market that is more conscious and focused on the search for superior quality coffees appears. To meet this demand, coffee growing is increasingly dependent on the use of more technically advanced processes, including the use of superior genetic materials, the use of irrigation, and the most modern harvest and post-harvest processes. Acc ...
... Flower color is one of the most important ornamental traits of flowering plants, and it has a major influence on the ornamental and economic value of flowers. The inflorescences of hydrangea are richly colored, and the plants with blue flowers are one of the most favorite types of hydrangeas. In this study, we identified the transcription factor HymMYB2 that is highly expressed in the sterile flow ...
beak; color; cultivars; fruit quality; fruit weight; genetic analysis; heritability; mangoes; mesocarp; statistical models; texture
Abstract:
... A key strategy to improve fruit quality and consumer appeal in mangoes is to breed trait improvements into new cultivars. There are several key fruit quality traits in mango. Knowledge of the heritability and relationship among these traits is important for breeding success. This paper implements a linear mixed model analysis including paternal information for analysis of 13 important fruit qualit ...
... Establishing a genetic basis of consumer liking and identifying the traits underlying consumer liking are necessary components to build a vegetable breeding program guided by consumer preference. Leafy Brassica (Brassica oleracea) crops are diverse and provide a unique platform to understand the relevance of consumer response and market potential of new genotypes in a breeding program. In this stu ...
Ana Flávia Silva Amorim; Thiago Alexandre Santana Gilio; Janaina Barros de Jesus; Luiz Henrique Amorim de Souza; Isabela Vera dos Anjos; Kelly Lana Araujo; Marco Antonio Aparecido Barelli; Sandra da Costa Preisigke; Leonarda Grillo Neves
... The fruit anthracnose caused by the pathogen Colletotrichum scovillei is the most important disease of the tabasco pepper. The use of resistant cultivars is the most cost-effective strategy to manage this disease; however, the genetic parameters of this disease are still incipient in Capsicum frutescens. The objective of the present work was to evaluate the agronomical potential and resistance to ...
Gareth J. Norton; Anthony Travis; Panthita Ruang-areerate; Graeme W. Nicol; Ayotunde A. Adeosun; Mahmud Hossain; M. Rafiq Islam; Alex Douglas; Adam H. Price
cadmium; cluster analysis; cultivars; genotype; humans; quantitative traits; rice; water treatment; India
Abstract:
... It has been estimated that up to 90% of human exposure to cadmium is through food, and that cadmium within rice grains can be a major contributor to that dietary source. In this study genome wide association mapping was conducted on the Bengal and Assam Aus Panel (BAAP) of rice to identify quantitative trait loci and candidate genes for lowering grain cadmium. Field experiments were conducted over ...
... The goal of yam bean improvement in Africa is to develop superior high yielding and high dry matter cultivars that are preferred for adoption. In this study, the estimates of variance components, heritability and response to selection were studied in F₃ yam bean families selected from interspecies crosses targeting improvement of storage root dry matter and associated traits. Breeding populations ...
... Lodging (stem bending) is a serious problem causing severe yield reduction, poor grain filling, lower harvest index and deterioration in grain quality of chickpea in environments characterized by favorable temperatures and soil moisture conditions. Breeding for lodging resistance is also required to improving adaptation to better agronomy for achieving a breakthrough in its productivity and stabil ...
... Septoria tritici blotch (STB), caused by the fungus Zymoseptoria tritici, is a major constraint in global wheat production. The lack of genetic diversity in modern elite wheat cultivars largely hinders the improvement of STB resistance. Wheat landraces are reservoirs of untapped genetic diversity, which can be exploited to find novel STB resistance genes or alleles. Here, we characterized 188 Swis ...
agronomic traits; cultivars; genome-wide association study; seeds; single nucleotide polymorphism; surface area; wheat
Abstract:
... Grain morphology is an important agronomic trait since its strongly associated with thousand kernel weight, which is one of the main objectives for high–yield wheat breeding. The grain morphology–related traits were controlled by QTLs which were pyramided in wheat cultivars. To detect more genetic variants for grain morphology–related traits in improved varieties, a panel of 543 wheat accessions w ...
... The aim of this study was to assess genotype by environment interaction for grain yield, plant height and thousand-grain weight in winter triticale cultivars by the additive main effects and multiplicative interaction (AMMI) model. The study comprised of ten winter triticale varieties i.e.: Algoso, Baltiko, Grenado, Magnat, Moderato, Pawo, Todan, Trimester, Trismart and Witon. Field trials were pe ...
... The root-knot nematode (RKN; Meloidogyne incognita) and reniform nematode (RN; Rotylenchulus reniformis) reduce Upland cotton (Gossypium hirsutum) yields nearly 5% annually throughout the United States. Recent work has proved successful in transferring the chromosome 11 (Chr11) and 14 RKN resistance QTL and the chromosome 21 Renᵇᵃʳᵇ² RN resistance QTL into elite Upland cultivars. The deployment of ...
... Crop cultivar performance is a result of combined effects of genotype, environment and genotype × environment (G × E) interaction. To effectively generate reliable estimates of crop yield the magnitude and patterns of G × E in regional yield trials should be specified. This research aimed to (1) investigate existing possible mega-environments (ME) and suitability of test locations for winter wheat ...
... Rice growth and productivity are greatly affected by cold stress, which is likely to become more of a hindrance for high and stable rice yields. To identify cold tolerance at the booting and flowering stages in rice, a recombinant inbred line was developed by crossing a cold-tolerant japonica cultivated variety, Jileng1, with a cold-sensitive indica cultivated variety, Milyang23. The seed setting ...
... Tan spot, caused by Pyrenophora tritici-repentis, is a major foliar disease of wheat in Kazakhstan. This study evaluated 103 winter wheat genotypes for tan spot resistance and high-productivity traits in the field in two years. Entries were also characterized using the molecular marker Xfcp623, indicative of Tsn1 gene conferring sensitivity to Ptr ToxA. The proportion of entries insensitive to Ptr ...
... Cotton (Gossypium hirsutum L.) has nectar containing modified stomates called nectaries that can be located on leaves, bracts or calyces. The nectar attracts some beneficial insects such as bees, but also predatory damaging insects such as heliothines and Lygus species. There is a naturally occurring mutation that eliminates the nectar containing nectaries and makes the cotton plants less attracti ...
... Adequate knowledge, access and introgression of genetic diversity available in cultivated and wild relatives are pre-requisites for widening the genetic base of cultivars to sustain genetic improvement. An attempt was made to screen anthracnose resistance in 33 indigenous and exotic accessions of common bean (Phaseolus vulgaris L.) belonging to primary, secondary, tertiary and quaternary gene pool ...
... Fruit shape index (round shape) and seed size have important effects on pumpkin yield. To investigate these traits and to create the most desirable state, a cross was made between two pumpkin cultivars. This study aimed to estimate the main gene effects (additive, dominant and di-genic epistasis) and to determine the mode of inheritance for fruit shape and seed size by generation mean analysis. Si ...
... Rice black-streaked dwarf virus (RBSDV) disease is one of the most destructive viral diseases that threatens rice production in China. Breeding of resistant cultivars through multi-gene pyramiding is considered to be an effective way to control the disease, but few resistance genes have been characterized to date. In the present study, we identified T1012, a BC₂F₆ line from a cross of the japonica ...
... Salinity tolerance plays an important role in direct seeding cultivation since tolerance to salinity at the bud burst stage of rice directly affects seedling formation and yield. However, information on the quantitative trait loci (QTL) associated with salinity tolerance at the bud burst stage is limited. Here, a recombinant inbred line (RIL) population, derived from a cross between Kongyu131 (sal ...
... Stripe (yellow) rust caused by Puccinia striiformis f. sp. tritici (Pst) is a major disease in many wheat growing regions. The objective of this study was to characterise stripe rust resistance in a common wheat landrace PI388231, originated from Sindh province of Pakistan, which confers high to moderate levels of resistance against Pst pathotypes prevalent in Pakistan. A recombinant inbred line ( ...
... The production of winter oilseed rape (WOSR) (Brassica napus) together with increasing seed yields per hectare is one of the strategies for breeding the genetic base of oilseed rape genotypes adapted to different environments. The main objective of this study was to evaluate the genotypic performance of 25 winter oilseed rape genotypes using mixed models. The plant material was examined in five lo ...
... Brazil is one of the world’s leading producers of sour passion fruit (Passiflora edulis Sims), a specie with high genetic variability. This variability can be exploited in breeding programs to develop cultivars with high yield potential and resistant to biotic and abiotic stress. The aim of the present study was to quantify the genetic divergence in families of full-sibs of sour passion fruit and ...
Emanuel Feitosa de Assunção; Claudeana Souza da Conceição; Elizabeth Rodrigues Alexandre; Marco Aurélio Siqueira da Gama; Glauber Henrique de Souza Nunes; Elineide Barbosa de Souza
... Bacterial fruit blotch, which is caused by Acidovorax citrulli, is one of the most common diseases of melon crops. To date, there is no disease-resistant commercial cultivar, and management strategies have not been efficient. Therefore, the objectives of this study were to identify melon accessions with genetic resistance to bacterial fruit blotch at different phenological stages of plant growth a ...
Cowpea aphid-borne mosaic virus; Passiflora edulis f. flavicarpa; backcrossing; cultivars; early development; hybrids; passion fruits; phenology; vigor
Abstract:
... Developing yellow passion fruit cultivars capable of combining precocity, productivity and resistance to Cowpea aphid-borne mosaic virus (CABMV) is essential to passiculture. The aim of the current study is to evaluate vegetative and reproductive precocity, as well as resistance to CABMV, in a population of third generation backcross (BC3) involving an interspecific hybrid (P. edulis x P. cincinna ...
... Experimental results are brought together to demonstrate that forage kale population improvement involving full-sib and selfed families can be done on an annual cycle, followed by production of a synthetic cultivar. Furthermore, this new breeding method compares favourably with the two successful methods used to date, namely triple-cross hybrid cultivars from inbreeding and crossbreeding programme ...
... In serious situations, soybean white mold (SWM) disease caused by Sclerotinia sclerotiorum (Lib.) de Bary can result in yield losses of up to 60%. Current management of the disease involves an integrated approach with a high dependence on fungicides; however, fungicide usage increases production costs and environmental pollution. Alternatively, using resistant cultivars may be another effective wa ...
Cowpea aphid-borne mosaic virus; Passiflora; backcrossing; cultivars; disease progression; fruit yield; fruits; heritability; passion fruits; prediction; statistical analysis; variance; Brazil
Abstract:
... Passion fruit woodiness disease induced by Cowpea aphid-borne mosaic virus (CABMV) is currently the most harmful viral disease affecting passion fruit crops. Given the economic importance of this fruit crop in Brazil, it is essential that passion fruit breeding programs invest in developing resistant and productive cultivars. The goals of this study were to estimate genetic parameters of agronomic ...
... Selection of grazing-tolerant lucerne (Medicago sativa) germplasm with low autumn dormancy and erect growth habit, suitable to environments with mild winters, is hindered by genetically-based tradeoffs among these traits. Marker-assisted selection (MAS) may help overcoming the difficulty of phenotypic selection and hasten the breeding process. Over 400 progenies from four bi-parental crosses betwe ...
... Anthracnose, caused by Colletotrichum lentis, is one of the most damaging diseases of lentil (L. culinaris) in western Canada. Lens ervoides accession IG 72815 exhibits high levels of resistance to the pathogenic races 0 and 1. The objective of this study was to identify quantitative trait loci (QTL) associated with anthracnose resistance in lentil using a recombinant inbred line (RIL) population ...
Triticum aestivum; bioinformatics; chromosome mapping; coleoptiles; cultivars; dissection; genomics; genotyping by sequencing; marker-assisted selection; microsatellite repeats; seedling emergence; soil water; stand establishment; water use efficiency; wheat
Abstract:
... Seedling emergence (SE) is an essential trait in wheat (Triticum aestivum L.) that allows desirable stand establishment even when adequate seed-zone soil moisture is present at depths of 10 cm or greater. The SE trait bestows several other advantages, including lodging resistance and improved water use efficiency. The aim of this study was to understand the genetic basis of SE. It has previously b ...
DNA; cucumbers; cultivars; downy mildew; firmness; fractal dimensions; fruit quality; fruit texture; fruits; genes; hardness; placenta; powdery mildew; quantitative trait loci
Abstract:
... Fruit firmness and crispness are important traits of cucumber because they directly affect its commercial value. We performed quantitative trait locus (QTL) analysis of these fruit texture traits with the double-digest restriction-site-associated DNA sequencing (ddRAD-Seq) technique and detected 31 QTLs for fruit firmness: 11 for placenta firmness, 12 for skin firmness, and 8 for flesh firmness; a ...
André Ricardo Zeist; Juliano Tadeu Vilela de Resende; Amanda Carvalho Perrud; André Gabriel; Wilson Roberto Maluf; José Henrique Verhalem Arantes; Khamis Youssef
Bemisia argentifolii; Bemisia tabaci; cultivars; gene pool; interspecific variation; introgression; leaves; pest control; pest resistance; tomatoes; trichomes
Abstract:
... Chemical insecticides comprise the most widely used method of tomato pest control. Genotypes resistant to pests such as the silver leaf whitefly Bemisia tabaci may contribute towards the decreased use of insecticides to protect the environment. Leaf trichomes play a role in imparting resistance to pests, and exploiting intraspecific and interspecific variability for leaf trichomes in the tomato ge ...
cultivars; fungi; sugar industry; sugarcane; China
Abstract:
... Pokkah boeng is an epidemic fungal disease that greatly affects the development of the sugarcane industry in China. Resistance to pokkah boeng disease differs among sugarcane varieties. Breeding and planting resistant cultivars is the most economic and effective measure for controlling this disease. In this study, new sugarcane varieties bred by sugarcane research units in China and the major vari ...
... There is current interest in the revalorization of legume crops such as one-flowered vetch (Vicia articulata) that was widely cultivated in the past, but is today underutilized. Characterization of responses of existing germplasm to major biotic constraints is crucial for cultivar development. Our studies confirm that V. articulata germplasm can be severely infected by rusts, particularly by the r ...
Ramon de Moraes; Marcelo Vivas; Derivaldo Pureza da Cruz; Renato Santa-Catarina; Rafael Nunes de Almeida; Yure Pequeno de Souza; Rogério Figueiredo Daher; Alexandre Pio Viana; Messias Gonzaga Pereira
... Papaya has a narrow genetic base concerning disease resistance, with few genetically distinct cultivars for planting in the world. Losses in crop production caused by fungal and viral diseases, added to the absence of resistant cultivars available to producers, have reduced the competitiveness of crops. Therefore, this study aimed to select promising individuals for resistance to phoma spot and bl ...
... Multi-environment trials have a fundamental role in the selection of the best genotypes across different environments before its commercial release. This study was carried out to identify high-yielding stable sunflower hybrids using the graphical method of the GGE biplot. For this purpose, 11 new hybrids along with four hybrid cultivars were evaluated in a randomized complete block design with fou ...
Saulo Fabrício da Silva Chaves; Rafael Moysés Alves; Rodrigo Silva Alves; Alexandre Magno Sebbenn; Marcos Deon Vilela de Resende; Luiz Antônio dos Santos Dias
... The cultivation of Theobroma grandiflorum in the Brazilian Amazon is mainly conducted by family farmers who use a range of different management strategies. Thus, breeding programs of the species must address the challenge of developing cultivars that are adapted and stable in a variety of cultivation environments. In this context, this study aimed to estimate the optimum number of harvests for gen ...
... Practical and statistically sound methods are required to provide reliable assessments of the tolerance to P. thornei of large numbers of wheat genotypes for plant breeders’ selections and growers’ choice of cultivars to sow in the subtropical grain region of eastern Australia. We showed from six experiments that tolerance indices for wheat genotypes as ratios of grain yield from paired high and l ...
... We present a summary of Puccinia triticina virulence surveys in former Czechoslovakia and Czech Republic from the 1960s to 2019. Cultivars Malakoff, Carina, Brevit, Webster, Loros, Mediterranean, Hussar, Democrat and, later Salzmünder Bartweizen, were used as differentials until 2002. Thereafter tests were carried out on Thatcher near-isogenic lines (NILs) possessing resistance genes Lr1, Lr2a, Lr ...
... It has been reported that F1 LA hybrids could produce a small number of functional 2n eggs regardless of their male sterility, however, there are very little similar phenomena reported in OA, LO, or OT hybrids, though there are many allotriploid cultivars in flower markets, involving distant hybrids. To investigate the occurrence of 2n eggs in distant lily F1 hybrids, a diploid OT hybrid was analy ...