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An Acad Bras Cienc. 2014 Dec;86(4):1801-12. doi: 10.1590/0001-3765201420130489.

Preferential accumulation of sex and Bs chromosomes in biarmed karyotypes by meiotic drive and rates of chromosomal changes in fishes.

Author information

1
Departamento de Biologia Celular e Genética, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brasil.
2
Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brasil.
3
Departamento de Ingeniería en Biotecnología, Universidad Nacional de Río Negro, Villa Regina, Argentina.

Abstract

Mechanisms of accumulation based on typical centromeric drive or of chromosomes carrying pericentric inversions are adjusted to the general karyotype differentiation in the principal Actinopterygii orders. Here, we show that meiotic drive in fish is also supported by preferential establishment of sex chromosome systems and B chromosomes in orders with predominantly bi-brachial chromosomes. The mosaic of trends acting at an infra-familiar level in fish could be explained as the interaction of the directional process of meiotic drive as background, modulated on a smaller scale by adaptive factors or specific karyotypic properties of each group, as proposed for the orthoselection model.

PMID:
25590717
DOI:
10.1590/0001-3765201420130489
[Indexed for MEDLINE]
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