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... The analysis of genetic correlations between fiber length (Len), strength (Str), micronaire, and 12 other traits was conducted using the additive (A)-dominance (D) genetic model, which considers genotype × environment interaction effects, in intraspecific upland cotton (Gossypium hirsutum L.) hybrids to effectively improve the quality of cotton cultivars in high planting density cases. Decision-ma ...
air temperature; ambient temperature; biomass; bolls; branches; carbohydrate content; cotton; cultivars; developmental stages; flowers; fruiting; harvest index; leaf area index; leaves; photosynthesis; photosynthetically active radiation; planting date; relative humidity; ribulose-bisphosphate carboxylase; shoots; sucrose; sucrose synthase; Yangtze River
Abstract:
... Because reproductive growth could be influenced by sucrose metabolism of major source leaf (leaf subtending to cotton boll, LSCB), we hypothesized that decreased temperatures under field conditions would limit morphology and biomass distributions of the whole cotton plant by decreasing photosynthesis of LSCB and inhibiting sucrose metabolism in LSCB. To address this hypothesis, two cotton cultivar ...
... The neotropical brown stink bug, Euschistus heros (F.), is a phytophagous pentatomid that causes considerable economic losses in soybean crop, but it has been recently reported using cotton as a new host plant. Nymphs and adults of E. heros were raised on six different food sources composed of the reproductive structures of cotton and soybean plants: a standard diet (green-bean pods + raw peanuts ...
Gossypium arboreum; bolls; carbohydrate metabolism; diploidy; energy; energy metabolism; gene expression regulation; gibberellic acid; homeostasis; hydrogen peroxide; lint cotton; microscopy; mutants; ovules; protein synthesis; proteins; proteomics; signal transduction; temporal variation
Abstract:
... In this study, a comparative proteomic analysis was employed to identify fuzz fiber initiation-related proteins in wild-type diploid cotton (Gossypium arboreum L.) and its fuzzless mutant. Temporal changes in global proteomes were examined using 2-DE at five developmental time points for fuzz fiber initiation, and 71 differentially expressed protein species were identified by MS, 45 of which were ...
Steven D. Wright; Robert B. Hutmacher; Gerardo Banuelos; Bruce A. Roberts; Daniel S. Munk; Katherine A. Wilson; Sonia I. Rios; Kelly A. Hutmacher; Mark P. Keeley; Jonathan F. Wrobles
Gossypium hirsutum; bolls; crops; cultivars; defoliants; defoliation; developmental stages; diuron; ethephon; fiber quality; growers; harvest date; high volume instruments; lint cotton; lint yield; rain; thidiazuron; California; Southeastern United States
Abstract:
... Chemical defoliation is a necessary pre-harvest practice in cotton (Gossypium hirsutum L.) production in California, and all harvest aid efforts require proper timing to preserve cotton lint yield and quality. Generally, cotton growers are advised to begin defoliation as early as possible, but not so early that they cause yield and quality loss. In order to have confidence in this final pre-harves ...
Gossypium hirsutum; Lygus hesperus; bolls; cotton; fiber quality; fruit set; insecticides; insects; irrigation; lint yield; plant damage; rearing; Texas
Abstract:
... A 3-yr field study quantified the compensatory ability of cotton (Gossypium hirsutum L.) to preflower fruit damage by Lygus hesperus Knight in the Texas High Plains under limited irrigation. Experiments were designed to achieve varying levels of preflower fruit loss by augmenting Lygus bug populations using nymphal bugs reared in a laboratory colony. Treatments included 1) three bugs per plant (3P ...
... Cotton is the world’s leading natural fiber and second most important oilseed crop and has been a focus of genetic, systematic and breeding research. The genetic and physiological bases of some important agronomic traits in cotton were investigated by QTL mapping through constructing of genetic map with chromosomal assignment. A segregating F2 population derived from an interspecific cross (G. bar ...
... Plant growth requires cell wall extension. The cotton AtRD22-Like 1 gene GhRDL1, predominately expressed in elongating fiber cells, encodes a BURP domain-containing protein. Here, we show that GhRDL1 is localized in cell wall and interacts with GhEXPA1, an α-expansin functioning in wall loosening. Transgenic cotton overexpressing GhRDL1 showed an increase in fiber length and seed mass, and an enla ...
Gossypium hirsutum; bolls; bracts; carbon dioxide; carboxylation; cell respiration; cotton; gas exchange; leaves; light intensity; photosynthesis; prediction; protein content; respiratory rate; stomatal conductance; tetraploidy; water use efficiency
Abstract:
... Background and Aims Elucidation of the mechanisms by which plants adapt to elevated CO ₂ is needed; however, most studies of the mechanisms investigated the response of plants adapted to current atmospheric CO ₂. The rapid respiration rate of cotton (Gossypium hirsutum) fruits (bolls) produces a concentrated CO ₂ microenvironment around the bolls and bracts. It has been observed that the intercell ...
... The distribution of dry matter among the fractions of cotton boll (the bur, the fibre and the seed) may have significant impact on fibre biomass per boll, and consequently on lint yield. Little is known on how cotton boll allocates available photosynthetic assimilates to its components. A two-year field study was conducted to ascertain the difference in boll dry matter production and partitioning ...
Gossypium hirsutum; bolls; cotton; cropping systems; cultivars; fiber quality; herbicide resistance; lint yield; production costs; row spacing; weed control
Abstract:
... Modern cotton (Gossypium hirsutum L.) cultivars with herbicide resistance have rejuvenated an interest in narrow row cotton production, primarily because of the reduction of weed control problems encountered in the past with narrow row systems. While the primary goal of narrow row cotton is to reduce production costs, an agronomic and physiological evaluation of this cropping system is also needed ...
... Laboratory bioassay showed that the conventional pesticide, lambda-cyhalothrin, was more effective than thiamethoxam and buprofezin when tested against the newly hatched larvae of the pink bollworm, Pectinophora gossypiella (Saunders). The LC50 of thiamethoxam, buprofezin and lambda-cyhalothrin was 5.9, 87.5 and 4.9 ppm, respectively. When the synergism agent, piperonyl butoxide (PBO), was combine ...
... Background and aims: Long-fallow disorder is expressed as exacerbated deficiencies of phosphorus (P) and/or zinc (Zn) in field crops growing after long periods of weed-free fallow. The hypothesis that arbuscular-mycorrhizal fungi (AMF) improve the P and Zn nutrition, and thereby biomass production and seed yield of linseed (Linum usitatissimum) was tested in a field experiment. Methods: A factoria ...
... During surveys of cotton fields since 2009 in the Southern Khorasan province of Iran, symptomatic samples with lint and boll rot disease signs were collected and cultured on potato dextrose, malt extract agar and PARPH media. Several fungal isolates were obtained and identified. Among them, we found Penicillium expansum which to our knowledge is reported as a new pathogen of cotton worldwide; Fusa ...
... Genetic bases of earliness in upland cotton were investigated by recording and analyzing data on different phenological and morphological traits related to earliness. All traits inclusive of days to squaring, days to flowering, vertical flowering interval, horizontal flowering interval, days to first boll opening, boll maturity period, node number for the first fruiting branch and height for first ...
... Within-boll yield components are the most basic contributors to lint and seed yield of cotton (Gossypium hirsutum L.), which is a major source of natural fiber and edible oil throughout the world. Little information is available on genetic effects and heterosis of these traits in cotton. Three cotton cultivars and six breeding lines differing in within-boll yield components were used for this stud ...
... Current transgenic cotton varieties constitutively express transgenes encoding anti-pest proteins to protect against plant damage caused by insect attack. However, restricting the spatial expression of transgenes to the tissues in which their products are required is likely to improve crop performance and reduce environmental impacts. Therefore, we sought to identify native gene promoters that wou ...
... Conservation tillage may improve yield of cotton in addition to improvement in soil quality if practiced for longer period. However, the practice may not be productive in short-term particularly when severe weeds are infesting the crops such as Cynodon dactylon, Conyza canadensis, Tribulus terrestris, and Cyperus rotundus, etc. Recent studies indicate that conventional tillage (CT) is more product ...
... Neps are fiber entanglements created during the mechanical processing of cotton and are often associated with immature fibers. Even in small amounts neps can affect textile quality and cotton marketability. Machine harvesting, lower fiber linear density (fineness), and more immature bolls at harvest are factors that contribute to neps. However, it is not clear whether differences in fiber linear d ...
agricultural colleges; bolls; branches; corn; cotton; cropping sequence; crops; deficit irrigation; dry matter accumulation; field experimentation; grain yield; income; irrigation rates; leaf area index; microirrigation; raised beds; root zone drying; soil water; surface irrigation; water stress; India
Abstract:
... Field experiments were conducted at Agricultural College and Research Institute, Coimbatore, India during 2007–2009 to study the effect of deficit irrigation practices implemented through drip irrigation system on cotton–maize cropping sequence. Creation of soil moisture gradient is essential to explore the beneficial effects of partial root zone drying (PRD) irrigation; and it could be possible t ...
... The untapped potential of the beneficial alleles from Gossypium barbadense L. has not been well utilized in G. hirsutum L. (often referred to as Upland cotton) breeding programs. This is primarily due to genomic incompatibility and technical challenges associated with conventional methods of interspecific introgression. In this study, we used a hypoaneuploid-based chromosome substitution line as a ...
... The high cost of insecticides, the emergence of insecticide resistance in populations of a number of insect species and other problems arising from their continuous use, such as biological imbalance, cotton fiber waste, and environmental pollution, have prompted the development of new technologies aiming the control of Anthonomus grandis Boheman in cotton crops. This study evaluated the level of p ...
... KEY MESSAGE : Cell type-specific promoters were identified that drive gene expression in an industrially important product. To identify flax (Linum usitatissimum) gene promoters, we analyzed the genomic regions upstream of a fasciclin-like arabinogalactan protein (LuFLA1) and a beta-galactosidase (LuBGAL1). Both of these genes encode transcripts that have been found to be highly enriched in tissue ...
... The growth regulator mepiquat chloride (MC) is used in cotton production across the globe to control plant growth and maximize yield and quality of cotton. With the conversion from hand picking to mechanical harvesting in China, plant densities are increased, and more compact plants are required, leading to the need to reconsider MC application schedules. Experiments were carried out in 2009 and 2 ...
... Identification of stable quantitative trait loci (QTLs) across different environments and mapping populations is a prerequisite for marker-assisted selection (MAS) for cotton yield and fiber quality. To construct a genetic linkage map and to identify QTLs for fiber quality and yield traits, a backcross inbred line (BIL) population of 146 lines was developed from a cross between Upland cotton (Goss ...
... The boll distribution characteristics of upland cotton (Gossypium hirsutum L.) cultivars are related to cotton maturity and can interact with environment and management practices to determine yield and fiber quality. The boll distributions of six cotton cultivars under four irrigation levels were compared in 2011 and 2012 on the Texas High Plains. In 2011, a year of severe drought and heat, all cu ...
... The verde plant bug, Creontiades signatus Distant (Hemiptera: Miridae), has emerged as a threat to cotton in South Texas, causing boll damage similar to boll-feeding stink bugs (Hemiptera: Pentatomidae). Verde plant bugs were released into caged cotton for a one-week period to characterize the effects of insect density and bloom period of infestation on cotton damage and yield. When plants were in ...
... The ability to monitor verde plant bug, Creontiades signatus Distant (Hemiptera: Miridae), and the progression of cotton, Gossypium hirsutum L., boll responses to feeding and associated cotton boll rot provided opportunity to assess if single in-season measurements had value in evaluating at-harvest damage to bolls and if multiple in-season measurements enhanced their combined use. One in-season v ...
... The ability to monitor verde plant bug, Creontiades signatus Distant (Hemiptera: Miridae), and the progression of cotton, Gossypium hirsutum L., boll responses to feeding and associated cotton boll rot development provided opportunity to assess if a single in-season measurement had value in evaluating subsequent at-harvest damage to bolls and if multiple in-season measurements enhanced their combi ...
... Ribulose bis-carboxylase/oxygenase small subunit genes (rbcS) are found to be highly expressed in most plant species. Promoters of rbcS genes have been isolated, characterized, and used to enhance expression of transgenes in transgenic lines. In this study, we have identified five different members of the rbcS gene family in cotton (Gossypium hirsutum). All five genes contain three exons and two i ...
... In the late 1980s, after a long period during which insecticides were sprayed at preset dates to control cotton (Gossypium hirsutum L.) pests and their damage, some French-speaking countries in sub-Saharan areas decided to disseminate a special form of crop protection approach among smallholders, i.e. targeted staggered control (LEC, for Lutte étagée ciblée). According to this approach, decisions ...
... The southern green stink bug, Nezara viridula (L.) (Heteroptera: Pentatomidae), is cosmopolitan in distribution and feeds on a multitude of food and fiber crops. It induces abscission of bolls of cotton, Gossypium hirsutum L., and reduces seed cotton yield, gin-turnout, and fiber quality. Also, the bug vectors bacterial and fungal pathogens causing necrosis of the locule and rotting the bolls. Con ...
... The verde plant bug, Creontiades signatus (Distant), has been present in south Texas for several years but has more recently been documented as an economic threat to cultivated cotton, (Gossypium hirsutum L. Our studies over 2 yr (2009 and 2010) and two locations (Weslaco and Corpus Christi, TX) investigated feeding-injury of the verde plant bug to a range of cotton boll age classes defined by bol ...