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The evolution of sex ratios and sex-determining systems

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Uller, T and Pen, I and Wapstra, E and Beukeboom, LW and Komdeur, J (2007) The evolution of sex ratios and sex-determining systems. Trends in Ecology and Evolution, 22 (6). pp. 292-297. ISSN 0169-5347

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Abstract

Sex determination is a fundamental process governed
by diverse mechanisms. Sex ratio selection is commonly
implicated in the evolution of sex-determining systems,
although formal models are rare. Here, we argue that,
although sex ratio selection can induce shifts in sex
determination, genomic conflicts between parents and
offspring can explain why single-factor systems (e.g. XY/
XX or ZW/ZZ) are common even in species that experience
selection for biased sex ratios. Importantly, evolutionary
shifts in sex determination do not always result
in the biased production of sons and daughters sensu
sex ratio theory. Thus, equal sex ratios might be an
emergent character of sex-determining systems even
when biased sex ratios are favored by selection.

Item Type: Article
Journal or Publication Title: Trends in Ecology and Evolution
Page Range: pp. 292-297
ISSN: 0169-5347
Identification Number - DOI: 10.1016/j.tree.2007.03.008
Date Deposited: 13 Oct 2007 02:43
Last Modified: 18 Nov 2014 03:23
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