鸟类W性染色体的平行分化与退化

Parallel divergence and degradation of the avian W sex chromosome.

作者信息

Mank Judith E, Ellegren Hans

机构信息

Uppsala University, Evolutionary Biology Centre, Department of Evolutionary Biology, Norbyvägen 18D, SE 752 36, Uppsala, Sweden.

出版信息

Trends Ecol Evol. 2007 Aug;22(8):389-91. doi: 10.1016/j.tree.2007.05.003. Epub 2007 Jun 15.

DOI:10.1016/j.tree.2007.05.003

PMID:17573147

Abstract

Sex chromosomes are ubiquitous in birds but our understanding of how they originated and evolved has remained incomplete. Recent work by Tsuda et al. on tinamou and ratite birds suggests that, although all bird sex chromosomes evolved from the same pair of autosomes, the Z and W sex chromosomes have diverged from one another several times independently. This parallel evolution of the avian W presents a means for comparison in studies of sex chromosome evolution, which could help us understand more about the general forces that shape the development of all types of sex chromosome.

摘要

性染色体在鸟类中普遍存在，但我们对它们如何起源和进化的理解仍不完整。津田等人最近对䳍形目鸟类和鸵鸟目鸟类的研究表明，尽管所有鸟类的性染色体都由同一对常染色体进化而来，但Z和W性染色体已多次独立地彼此分化。鸟类W染色体的这种平行进化为性染色体进化研究提供了一种比较方法，这有助于我们更深入地了解塑造各类性染色体发育的一般力量。