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The satellite DNA AflaSAT-1 in the A and B chromosomes of the grasshopper Abracris flavolineata
(BioMed Central, 2017-08-29)
Background: Satellite DNAs (satDNAs) are organized in repetitions directly contiguous to one another, forming long arrays and composing a large portion of eukaryote genomes. These sequences evolve according to the concerted ...
Evidence of the occurrence of structural chromosome changes at the initial diploid diversification of the autopolyploid Turnera sidoides L. (Passifloraceae) complex
(Natl Research Council Canada-n R C Research Press, 2015-11)
Turnera sidoides L. (x = 7) is an autopolyploid complex of obligate outcrossing perennial herbs. Includes five taxonomic subspecies and seven morphotypes in which different ploidy levels were found from diploid to octoploid. ...
Estradiol-dependent axogenesis and Ngn3 expression are determined by XY sex chromosome complement in hypothalamic neurons
(Nature Research, 2020-12)
Hypothalamic neurons show sex differences in neuritogenesis, female neurons have longer axons and higher levels of the neuritogenic factor neurogenin 3 (Ngn3) than male neurons in vitro. Moreover, the effect of 17-β-estradiol ...
B chromosomes and fertility in a native population of Hymenachne amplexicaulis (Poaceae: Panicoideae: Paspaleae)
(Elsevier Science, 2018-06)
Fertility is a measure of reproductive success, defined as the capacity of an individual to reproduce and generate offspring, and has been identified as an important trait correlating to the invasive ability of a species. ...
Comparative genomic mapping reveals mechanisms of chromosome diversification in Rhipidomys species (Rodentia, Thomasomyini) and syntenic relationship between species of Sigmodontinae
(Public Library of Science, 2021-10)
Rhipidomys (Sigmodontinae, Thomasomyini) has 25 recognized species, with a wide distribution ranging from eastern Panama to northern Argentina. Cytogenetic data has been described for 13 species with 12 of them having 2n ...
Inestabilidad cariológica durante la formación de células madres del polen en Aloe vera (Aloaceae)
(Universidad de Costa Rica, 2007)
Chromosome evolution in the cosmopolitan genus Lycium (Solanaceae)
(International Association for Plant Taxonomy, 2020-04)
Lycium is the only member of tribe Lycieae (Solanoideae, Solanaceae), and it has a cosmopolitan distribution with its greatest diversity in southern South America, southern Africa, and southwestern North America. To date, ...
Chromosome 18 ring syndrome. Case report and review of the literatureSíndrome del anillo del cromosoma 18. Reporte de un caso y revisión de la literatura
(Universidad Centroccidental Lisandro Alvarado, 2020)
Cytogenetic studies in herbertia sw. (iridaceae)
(University Florence Botany Institute, 2009-12)
Conventional Feulgen staining, CMA/DAPI banding and FISH with 18-5.8-26S rDNA probe were used to determine chromosome numbers, karyotypes and physical position of GC or AT rich heterochromatin and rDNA sites in three South ...
Uncovering the evolutionary history of neo-XY sex chromosomes in the grasshopper Ronderosia bergii (Orthoptera, Melanoplinae) through satellite DNA analysis
(BioMed Central, 2018-01)
Background: Neo-sex chromosome systems arose independently multiple times in evolution, presenting the remarkable characteristic of repetitive DNAs accumulation. Among grasshoppers, occurrence of neo-XY was repeatedly ...