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

Anais da Academia Brasileira de Ciências

Wagner F. Molina¹  Pablo A. Martinez¹  Luiz A.c. Bertollo¹  Claudio J. Bidau¹ 

关键词: Actinopterygii;    B chromosomes;    centromeric drive;    chromosome evolution;    sex chromosomes;    Actinopterygii;    cromossomos Bs;    deriva centromérica;    evolução cromossômica;    cromossomos sexuais;   

DOI  :  10.1590/0001-3765201420130489

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License