Genetic interactions controlling sex and color establish the potential for sexual conflict in Lake Malawi cichlid fishes

被引：59
作者：
Parnell, N. F. [1 ]
Streelman, J. T. [1 ]
机构：
[1] Georgia Inst Technol, Sch Biol, Inst Bioengn & Biosci, Atlanta, GA 30332 USA
来源：
HEREDITY | 2013年 / 110卷 / 03期
关键词：
sex determination; speciation; sexual antagonism; RAD-tag; QTL; cichlid; SYMPATRIC SPECIATION; PSEUDOTROPHEUS-ZEBRA; ANTAGONISTIC GENES; MODEL SYSTEM; MATE CHOICE; EVOLUTION; HYBRIDIZATION; MEDAKA; MALES; POLYMORPHISM;
D O I：
10.1038/hdy.2012.73
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
Sex-determining systems may evolve rapidly and contribute to lineage diversification. In fact, recent work has suggested an integral role of sex chromosome evolution in models of speciation. We use quantitative trait loci analysis of restriction site-associated DNA -tag single nucleotide polymorphisms to identify multiple loci responsible for sex determination and reproductively adaptive color phenotypes in Lake Malawi cichlids. We detect a complex epistatic sex system consisting of a major female heterogametic ZW locus on chromosome 5, two separate male heterogametic XY loci on chromosome 7, and two additional interacting loci on chromosomes 3 and 20. Our data support the known chromosomal linkage between orange blotch color and ZW, as well as novel genetic associations between male blue nuptial color and two sex determining regions (an XY and ZW locus). These results provide further empirical evidence for a complex antagonistic sex-color system in this species flock and suggest a possible role for, and effect of, polygenic sex-determining systems in rapid evolutionary diversification. Heredity (2013) 110, 239-246; doi:10.1038/hdy.2012.73; published online 24 October 2012
引用
收藏
页码：239 / 246
页数：8
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