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Interclonal Variations in the Molecular Karyotype of Trypanosoma cruzi: Chromosome Rearrangements in a Single Cell-Derived Clone of the G Strain
(2013-05-07)
Trypanosoma cruzi comprises a pool of populations which are genetically diverse in terms of DNA content, growth and infectivity. Inter- and intra-strain karyotype heterogeneities have been reported, suggesting that chromosomal ...
Chromosomal diversification in populations of Characidium cf. gomesi (Teleostei, Crenuchidae)
(Wiley-Blackwell Publishing, Inc, 2011-01-01)
Comparative cytogenetic studies carried out in two populations of Characidium cf. gomesi from Botucatu region, SP, Brazil, showed a similar karyotypic structure in a diploid number of 50 chromosomes, 32 metacentric and 18 ...
B Chromosomes in Nierembergia aristata (Solanaceae): Nucleolar Activity and Competition with the A Chromosomes
(Karger, 2011-01)
B chromosomes are additional dispensable chromosomes that may be present in some individuals, populations, or species, which have probably arisen from the A chromosomes but follow their own evolutionary pathway. Supposedly, ...
Cytogenetic analysis of the Marsh Deer, Blastocerus dichotomus (Mammalia, Cervidae)
(1995-01-01)
The chromosomic constitution of the Marsh Deer (Blastocerus dichotomus) was studied in 18 males and 18 females, mainly from the Tiete river basin in Sao Paulo State, Brazil. The species diploid number was determined to be ...
Molecular cytogenetic analysis of heterochromatin in the chromosomes of tilapia, Oreochromis niloticus (Teleostei : Cichlidae)
(Kluwer Academic Publ, 1998-04-01)
The structure of the heterochromatic bands in mitotic chromosomes of the important tropical aquaculture species of tilapia, Oreochromis niloticus, was investigated by the combination of the C-banding technique, chromosomal ...
Differentiation and Evolution of the W Chromosome in the Fish Species of Megaleporinus (Characiformes, Anostomidae)
(2018-06-08)
The W chromosome of Megaleporinus trifasciatus was isolated in order to analyze its behavior in the karyotype of this and other species of the family, including forms with differentiated and undifferentiated sex chromosomes. ...
Karyotype diversity and patterns of chromosomal evolution in Eigenmannia (Teleostei, Gymnotiformes, Sternopygidae)
(2014-01-01)
Conventional (Giemsa, C-banding, Ag - NORs) and molecular [5S rDNA, 18S rDNA, (TTAGGG)n] cytogenetic techniques were employed to study six species of the genus Eigenmannia Jordan & Evermann, 1896. They exhibited diploid ...
Chromosomal diversification in populations of Characidium cf. gomesi (Teleostei, Crenuchidae)
(Wiley-Blackwell Publishing, Inc, 2011-01-01)
Comparative cytogenetic studies carried out in two populations of Characidium cf. gomesi from Botucatu region, SP, Brazil, showed a similar karyotypic structure in a diploid number of 50 chromosomes, 32 metacentric and 18 ...
High chromosome variability and the presence of multivalent associations in buthid scorpions
(2013-04-01)
In this study, we investigated the mitotic and meiotic chromosomes of 11 Buthidae scorpion species, belonging to three genera (Ananteris, Rhopalurus and Tityus), to obtain detailed knowledge regarding the mechanisms ...