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Transmission behavior of B chromosomes in Prochilodus lineatus (Characiformes, Prochilodontidae)
(2016-03-01)
The population of Prochilodus lineatus found in the Mogi-Guaçu River is karyotypically polymorphic, carrying acrocentric, metacentric, and submetacentric B chromosomes. The analysis of each B chromosome frequency in this ...
Comparative cytogenetic and morphological analysis of Astyanax scabripinnis paranae (Pisces, Characidae, Tetragonopterinae)
(Sociedade Brasileira de Genética, 1998-06-01)
Foram realizados estudos citogenéticos e morfológicos em nove populações locais de Astyanax scabripinnis paranae. Todas as populações apresentaram 2n = 50 cromossomos e conspícuas diferenças envolvendo a morfologia dos ...
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations
(Zoological Inst, 2012-01-01)
Ninety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Agua da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as ...
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations
(2012-01-01)
Ninety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as ...
Karyotype and NOR conservatism with heterochromatin reorganization in Neotropical Bryconids
(1996-01-01)
Cytogenetic studies on Bryconid fishes have shown the occurrence of karyotype and NOR conservatism and heterochromatin reorganization. The present data on three species representative of the migratory genus Brycon corroborate ...
Extensive spreading of interstitial telomeric sites on the chromosomes of Characidium (Teleostei, Characiformes)
(Springer, 2015-06-01)
Characidium comprises several species of small freshwater fish that display conserved diploid chromosome numbers and karyotypic formulae. In this study, a comparative cytogenetic analysis using telomeric DNA probes was ...
Elucidating the Evolution of the Red Brocket Deer Mazama americana Complex (Artiodactyla; Cervidae)
(Karger, 2010-01-01)
The red brocket deer Mazama americana is a neotropical species that exhibits extensive karyotype variation under an unvarying morphotype. In order to deduce red brocket deer genetic units for conservation, gene flow between ...
Chromosomal analysis of three Brazilian "eleutherodactyline" frogs (Anura : Terrarana), with suggestion of a new species
(Magnolia PressAucklandNova Zelândia, 2008)
Cytogenetic analysis in Thoracocharax stellatus (Kner, 1858) (Characiformes, Gasteropelecidae) from Paraguay river basin, Mato Grosso, Brazil
(2012-12-01)
Thoracocharax stellatus (Characiformes, Gasteropelecidae) is a small Neotropical species of fish, widely distributed in several rivers of South America. Evidence for karyotype heteromorphysm in populations from different ...