The genetic architecture of male colour differences between a sympatric Lake Malawi cichlid species pair

被引：21

作者：

Barson, N. J. ^{[1
]}

Knight, M. E. ^{[1
]}

Turner, G. F. ^{[1
]}

机构：

[1] Univ Hull, Dept Biol Sci, Kingston Upon Hull HU6 7RX, N Humberside, England

来源：

JOURNAL OF EVOLUTIONARY BIOLOGY | 2007年 / 20卷 / 01期

关键词：

Castle-Wright estimator; cichlid fish; male colour genes; sexual selection; speciation;

D O I：

10.1111/j.1420-9101.2006.01228.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The genetic basis of traits involved in reproductive isolation is a key parameter in models of sympatric speciation by sexual selection, a potential mechanism driving the explosive radiation of East African cichlids. Analysis of hybrid crosses between two sympatric Lake Malawi cichlid species, representing the extremes of the extant colour distribution, generated Castle-Wright estimates of four to seven loci controlling colour differences. Segregation patterns deviated from a purely additive model with a significant contribution from dominance, and possibly also epistasis. Evidence was found for a strong influence of autosomal loci. As departures from simple additive variation could effect the operation of models of sympatric speciation, dominance and epistasis should not be neglected.

引用

页码：45 / 53

页数：9

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