The genetic sex-determination system predicts adult sex ratios in tetrapods

被引：90

作者：

Pipoly, Ivett ^{[1
]}

Bokony, Veronika ^{[1
,2
]}

Kirkpatrick, Mark ^{[3
]}

Donald, Paul F. ^{[4
,5
]}

Szekely, Tomas ^{[6
]}

Liker, Andras ^{[1
]}

机构：

[1] Univ Pannonia, Dept Limnol, H-8201 Veszprem, Hungary

[2] Hungarian Acad Sci, Ctr Agr Res, Inst Plant Protect, Lendulet Evolutionary Ecol Res Grp, H-1022 Budapest, Hungary

[3] Univ Texas Austin, Dept Integrat Biol, Austin, TX 78712 USA

[4] Royal Soc Protect Birds, RSPB Ctr Conservat Sci, Sandy SG19 2DL, Beds, England

[5] Univ Cambridge, Dept Zool, Conservat Sci Grp, Cambridge CB2 3EJ, England

[6] Univ Bath, Dept Biol & Biochem, Milner Ctr Evolut, Bath BA2 7AY, Avon, England

来源：

NATURE | 2015年 / 527卷 / 7576期

基金：

美国国家科学基金会; 匈牙利科学研究基金会;

关键词：

EVOLUTION; POPULATIONS; SELECTION; BIRDS; PHYLOGENIES; CONFLICT; MEN; TOO;

D O I：

10.1038/nature15380

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The adult sex ratio (ASR) has critical effects on behaviour, ecology and population dynamics(1,2), but the causes of variation in ASRs are unclear(3,4). Here we assess whether the type of genetic sex determination influences the ASR using data from 344 species in 117 families of tetrapods. We show that taxa with female heterogamety have a significantly more male-biased ASR (proportion of males: 0.55 +/- 0.01 (mean +/- s.e.m.)) than taxa with male heterogamety (0.43 +/- 0.01). The genetic sex-determination system explains 24% of interspecific variation in ASRs in amphibians and 36% in reptiles. We consider several genetic factors that could contribute to this pattern, including meiotic drive and sex-linked deleterious mutations, but further work is needed to quantify their effects. Regardless of the mechanism, the effects of the genetic sex-determination system on the adult sex ratio are likely to have profound effects on the demography and social behaviour of tetrapods.

引用

页码：91 / 94

页数：4

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