2012
DOI: 10.1590/s1679-62252012005000014
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Abstract: In this work, Bunocephalus doriae was cytogenetically analyzed. A karyotype with a diploid number of 2n= 50 comprising 6m, 10sm, 6st, and 28a (FN= 72) chromosomes was observed. The occurrence of an asymmetric karyotype with a large number of acrocentric chromosomes distinguishes this species from others the Order Siluriformes. An exclusive character observed is the first pair of subtelocentric as the largest chromosome pair of the complement. NORs detected using AgNO3 were located in the terminal regions, on t… Show more

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Cited by 2 publications
(2 citation statements)
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“…In this sense, the other ESUs share a synapomorphic condition by presenting karyotypes mostly composed by acrocentric chromosomes, where pericentric inversions and/or centric fissions may have played a role. Such feature is also found in other Bunocephalus species, such as B. doriae ( Fenocchio and Swarça, 2012 ) and B. coracoideus population from the Negro River ( Ferreira et al, 2016 ), in which acrocentric chromosomes are also mainly composing the karyotype. Thus, taking in account the Oliveira and Gosztonyi (2000) proposition, it can be considered that the Bunocephalus ESUs A, B, and D presents a trend toward the reduction of the chromosome number in relation to other Siluriformes, while ESU-C maintained the probable ancestral 2n = 56 chromosomes.…”
Section: Discussionmentioning
confidence: 60%
See 1 more Smart Citation
“…In this sense, the other ESUs share a synapomorphic condition by presenting karyotypes mostly composed by acrocentric chromosomes, where pericentric inversions and/or centric fissions may have played a role. Such feature is also found in other Bunocephalus species, such as B. doriae ( Fenocchio and Swarça, 2012 ) and B. coracoideus population from the Negro River ( Ferreira et al, 2016 ), in which acrocentric chromosomes are also mainly composing the karyotype. Thus, taking in account the Oliveira and Gosztonyi (2000) proposition, it can be considered that the Bunocephalus ESUs A, B, and D presents a trend toward the reduction of the chromosome number in relation to other Siluriformes, while ESU-C maintained the probable ancestral 2n = 56 chromosomes.…”
Section: Discussionmentioning
confidence: 60%
“…Up to now, only two Bunocephalus species had cytogenetic studies already conducted, B. doriae and B. coracoideus . While the first one has 2n = 50 chromosomes, the later presents 2n = 42, in addition to a multiple X 1 X 1 X 2 X 2 /X 1 Y 1 X 2 Y 2 sex chromosome system ( Fenocchio and Swarça, 2012 ; Ferreira et al, 2016 ).…”
Section: Introductionmentioning
confidence: 99%