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Investigation of Partamona helleri (Apidae, Meliponini) B chromosome origin. An approach by microdissection and whole chromosome painting
(2013-01-01)
The stingless bee Partamona helleri in southeast Brazil shows the regular chromosome number 2n = 34 and a variable number of up to four minute B1 or B2 chromosomes. Previous cytogenetic analyses have indicated morphological ...
B chromosome variants in Prochilodus lineatus (Characiformes, Prochilodontidae) analyzed by microdissection and chromosome painting techniques
(2016-04-02)
Several cytogenetic studies in Prochilodus lineatus (Valenciennes 1836) describe a striking system of supernumerary microchromosomes revealing the occurrence of three morphological types visualized as acrocentric, metacentric ...
Independent fusions and recent origins of sex chromosomes in the evolution and diversification of glass knife fishes (Eigenmannia)
(NATURE PUBLISHING GROUP, 2011)
The genus Eigenmannia comprises several species groups that display a surprising variety of diploid chromosome numbers and sex-determining systems. In this study, hypotheses regarding phylogenetic relationships and karyotype ...
Preparation of chromosome-specific paints by flow-sorting of Xenopus tropicalis
(Springer, 2015-06-01)
Estudos evolutivos no gênero Triportheus (Characiformes, Triportheidae) com enfoque na diferenciação do sistema de cromossomos sexuais ZZ/ZW
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Genética Evolutiva e Biologia Molecular - PPGGEvCâmpus São Carlos, 2016-10-24)
Triportheus genus (Characiformes, Triportheidae) presents a particular scenario 1 in fishes, with a
ZZ/ZW sex chromosomes system for all species until now investigated. The Z chromosome is
metacentric and the largest ...
Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium
(Public Library Science, 2014-09-16)
Chromosome painting with DNA probes obtained from supernumerary (B) and sex chromosomes in three species of fish genus Characidium (C. gomesi, C. pterostictum and C. oiticicai) showed a close resemblance in repetitive DNA ...
First Chromosomal Analysis in Hepsetidae (Actinopterygii, Characiformes): Insights into Relationship between African and Neotropical Fish Groups
(Frontiers Media Sa, 2017-12-12)
Hepsetidae is a small fish family with only the genus Hepsetus, with six described species distributed throughout the South, Central and Western regions of Africa, showing a close relationship with the Alestidae and some ...