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chromosomenumber, etc ; B chromosomes; chromatin; gametophytes; males; meiosis; stickiness; India; Show all 8 Subjects
Abstract:
... Plants of Tinantia erecta (Jacq.) Fenzl were collected from four localities of Mussoorie, Uttarakhand (India) to investigate their cytological status and course of male meiosis. Three populations revealed the presence of n = 32 and one population showed the presence of n = 34 as the gametophytic chromosome count which is being reported for the first time from India. Presence of B- chromosomes (n = ...
chromosomenumber, etc ; Coccinia grandis; chromosomes; males; meiosis; mitosis; pollen viability; India; Show all 8 Subjects
Abstract:
... In our present study, three wild ♂ accessions of Coccinia grandis from Jammu, Samba and Kathua of Jammu province (J&K, India) have been worked out for cytological details. To determine the chromosome behavior, both meiotic and mitotic details were worked out for plants of all three locations. While Samba and Kathua accessions had somatic cells with uniform chromosome count of 2n = 24, few plants o ...
chromosomenumber, etc ; Astragalus; Oxytropis; chromosomes; cytotypes; diploidy; genome; hexaploidy; phylogeny; silica gel; tetraploidy; Show all 11 Subjects
Abstract:
... Astragalus section Hymenostegis is one of the important characteristic elements of thorn-cushion formations in the Irano-Turanian floristic region. In this paper, we examined the chromosome number of 17 species (15 new reports) and provide estimates of genome size for 62 individuals belonging to 38 taxa of A. sect. Hymenostegis, some species outside this section, plus two Oxytropis species. Based ...
chromosomenumber, etc ; Miscanthus; Saccharum officinarum; allopolyploidy; chromosome aberrations; chromosomes; cytotypes; fluorescence; karyotyping; phylogeny; sugarcane; Show all 11 Subjects
Abstract:
... Karyotypes provide key cytogenetic information on the phylogenetic relationships and evolutionary origins in related eukaryotic species. Despite our knowledge of the chromosome numbers of sugarcane and its wild relatives, the chromosome composition and evolution among the species in the Saccharum complex have been elusive owing to the complex polyploidy and the large numbers of chromosomes of thes ...
chromosomenumber, etc ; altitude; climate; diploidy; geographical distribution; humidity; multivariate analysis; polyploidy; salinity; soil salinity; Iran; Show all 11 Subjects
Abstract:
... Asparagus basic chromosome number is 2n = 2x = 20. The high rate of polyploidy in wild asparagus has been found in natural surroundings of Iran. It is not entirely clear how asparagus polyploidy occurs in relation to ecological areas. To investigate, climatic parameters were used to determine the effect of climate on the geographical distribution of diploid and polyploid asparagus. Wild asparagus ...
chromosomenumber, etc ; DNA viruses; Piper nigrum; abiotic stress; black pepper; genome; nucleotide sequences; polymerase chain reaction; Show all 8 Subjects
Abstract:
... A previous study named 7178 and 892 bp contigs obtained through high-throughput sequencing (HTS) of black pepper as Piper DNA virus 1 (PDV-1) and PDV-2 respectively. In the present study, HTS results were confirmed through polymerase chain reaction and Sanger sequencing. The sequenced region of both PDV-1 and PDV-2 contained partial genomes with motifs characteristic of pararetroviruses. BLAST ana ...
... Hibiscus moscheutos L., also known as hardy hibiscus, is valued for its medicinal and ornamental attributes. It is usually propagated via seeds or cuttings. The purpose of this investigation was to develop a dependable micropropagation for H. moscheutos ‘Luna White’. To that end, the effect of four explant types (leaf, root, node, shoot tip) and two growth regulators 6-benzylaminopurine (BA) and m ...
chromosomenumber, etc ; Tarenna; lectotypes; redescriptions; trees; Show all 5 Subjects
Abstract:
... Tarenna arborea, a Philippine endemic, is herein described and illustrated. This tree species is allocated to Tarenna subgenus Pacifica. The species name is lectotypified, and the chromosome number (2n = 22) is provided for the first time. ...
chromosomenumber, etc ; calyx; coma; new species; China; Show all 5 Subjects
Abstract:
... A new species of Curcuma L. subg. Curcuma (Zingiberaceae) from China, C. ruiliensis N. H. Xia & Juan Chen, is described and illustrated. The chromosome number (2n = 84) is reported here. The new species is most similar to C. kwangsiensis S. G. Lee & C. F. Liang, but distinguished by pale yellow rhizomes, obovate tubers, longer ligule, lanceolate, obliquely spreading coma bracts, apex attenuate nev ...
chromosomenumber, etc ; Musa acuminata; asymmetry; bananas; chromosome morphology; cluster analysis; desserts; genetic heterogeneity; genetic similarity; interphase; karyotyping; microsatellite repeats; triploidy; Show all 13 Subjects
Abstract:
... Cytological and simple sequence repeat (SSR) diversity of eight bananas and four plantains (Musa spp.) of the section Eumusa were analyzed. The chromosome characteristics and karyotype asymmetry reconfirmed triploid chromosome number of 2n = 3x = 33 in all varieties of Musa acuminata besides first reports in var. Desi Daskini Sagar and var. Shankara. Smaller chromosomes were observed in cooking va ...
... The genus Narcissus belongs to the family Amaryllidaceae. This genus has been the subject of numerous cytological and cytometric studies and have shown enormous variation in terms of genome size, ploidy level, and even the basic chromosome number. The basic chromosome numbers are 5 or 7, but 10, 11, and 12 have been recorded as well. Most narcissus cultivars are euploid tetraploids. There are also ...
chromosomenumber, etc ; Angiospermae; extinction; gene flow; longevity; polyploidy; Show all 6 Subjects
Abstract:
... Polyploidy is ubiquitous and often recursive in plant lineages, most frequently resulting in extinction but occasionally associated with great evolutionary success. However, instead of chromosome numbers exponentially increasing due to recurrent polyploidy, most angiosperm species have fewer than 14 chromosome pairs. Following genome duplication, diploidisation can render one copy of essential gen ...
chromosomenumber, etc ; Angiospermae; chromosomes; eukaryotic cells; genome; phylogeny; Show all 6 Subjects
Abstract:
... Chromosome number is a central feature of eukaryote genomes. Deciphering patterns of chromosome‐number change along a phylogeny is central to the inference of whole genome duplications and ancestral chromosome numbers. ChromEvol is a probabilistic inference tool that allows the evaluation of several models of chromosome‐number evolution and their fit to the data. However, fitting a model does not ...
chromosomenumber, etc ; B chromosomes; asymmetry; hexaploidy; karyotyping; tetraploidy; Show all 6 Subjects
Abstract:
... The genus Salvia is characterized by such small chromosomes, which has so far restricted the cytogenetic studies. Therefore, karyomorphological aspects of the chromosome complement were rarely analyzed in the genus. The aim of this study was to report the interspecific relationships and new chromosomal data in Salvia. The chromosomal records of 25 taxa were herein provided, 8 of which were reporte ...
chromosomenumber, etc ; Sagina; Willdenowia; color; fruits; phylogeny; Germany; Show all 7 Subjects
Abstract:
... The distinction of the annual Sagina apetala and S. micropetala (= S. apetala subsp. erecta, S. filicaulis) is based mainly on the position of sepals in fruit and shape and colour of the sepals, but identification of the two species is difficult. A molecular phylogeny of material identified as S. apetala and S. micropetala as well as other species of the genus using two nuclear and two plastid mar ...
chromosomenumber, etc ; Populus alba; Populus tomentosa; biotechnology; diploidy; ecological genetics; ecology; females; forestry; forests; genome assembly; hybrid species; males; urban horticulture; Asia; Show all 15 Subjects
Abstract:
... Populus has a wide ecogeographical range spanning the Northern Hemisphere, and interspecific hybrids are common. Populus tomentosa Carr. is widely distributed and cultivated in the eastern region of Asia, where it plays multiple important roles in forestry, agriculture, conservation, and urban horticulture. Reference genomes are available for several Populus species, however, our goals were to pro ...
chromosomenumber, etc ; Allium; Armeria; Hieracium; botanists; chromosomes; flora; Italy; Show all 8 Subjects
Abstract:
... AbstractIn this contribution, new chromosome data obtained on material collected in Italy are presented. It includes the first counts for Hieracium glanduliferum s.str. and H. tenuiflorum, counts for two Armeria species endemic to Italy, and for Onopordumillyricumsubsp.illyricum. We also present here the first chromosome count of Allium permixtum for Italy, where this species is known for few loc ...
chromosomenumber, etc ; Misgurnus anguillicaudatus; Paramisgurnus dabryanus; aquaculture; backcrossing; embryogenesis; females; freshwater fish; gonads; growth performance; hybrids; karyotyping; males; meiosis; progeny; selfing; East Asia; Show all 17 Subjects
Abstract:
... Dojo loach (Misgurnus anguillicaudatus) (DD, 2n = 50) and large-scale loach (Paramisgurnus dabryanus) (PP, 2n = 48) are freshwater fish species widely distributed across East Asia. Hybrids of these two loach species have disrupted gonadal development, but few studies have reported the actual fertility and chromosome number in gametes of reciprocal hybrid loaches (DD × PP and PP × DD, assigned as D ...
chromosomenumber, etc ; Festuca gigantea; cytotypes; hexaploidy; pollen; Himalayan region; India; Show all 7 Subjects
Abstract:
... Two cytotypes of ‘giant fescue’ sporting gametic chromosome number of n = 14 and n = 21 corresponding to 4x and 6x ploidy level (based on x = 7) were encountered in the various localities in India falling in the Western Himalayan region. The pollen mother cells of hexaploid cytotype also exhibited presence of B chromosomes (n = 21 + 0 − 2B). The intra-specific polyploidy had direct effect on both ...
José I. Márquez‐Corro; Santiago Martín‐Bravo; Pedro Jiménez‐Mejías; Andrew L. Hipp; Daniel Spalink; Robert F. C. Naczi; Eric H. Roalson; Modesto Luceño; Marcial Escudero
chromosomenumber, etc ; Carex; chromosomes; ecology; genome; phylogeny; polyploidy; reproductive isolation; Show all 8 Subjects
Abstract:
... Changes in holocentric chromosome number due to fission and fusion have direct and immediate effects on genome structure and recombination rates. These, in turn, may influence ecology and evolutionary trajectories profoundly. Sedges of the genus Carex (Cyperaceae) comprise ca. 2000 species with holocentric chromosomes. The genus exhibits a phenomenal range in the chromosome number (2n = 10 − 132) ...