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The role of Handane's rule in sex allocation

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Olsson, M and Madsen, T and Uller, T and Wapstra, E and Ujvari, B (2005) The role of Handane's rule in sex allocation. Evolution, 59 (1). pp. 221-225. ISSN 0014-3820

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Abstract

Sex allocation theory predicts that parents should bias their reproductive investments toward the offspring sex generating the greatest fitness return. When females are the heterogametic sex (e.g., ZW in butterflies, some lizards, and birds), production of daughters is associated with an increased risk of offspring inviability due to the expression of paternal, detrimental recessives on the Z chromosome. Thus, daughters should primarily be produced when mating with partners of high genetic quality. When female sand lizards (Lacerta agilis) mate with genetically superior males, exhibiting high MHC Class I polymorphism, offspring sex ratios are biased towards daughters, possibly due to recruitment of more Z-carrying oocytes when females have assessed the genetic quality of their partners. If our study has general applicability across taxa, it predicts taxon-specific sex allocation effects depending on which sex is the heterogametic one.

Item Type: Article
Keywords: Heterogamety, MHC polymorphism, sex ratio adjustment, sex-specific mortality (daughters)
Journal or Publication Title: Evolution
Page Range: pp. 221-225
ISSN: 0014-3820
Identification Number - DOI: 10.1111/j.0014-3820.2005.tb00908.x
Additional Information: The definitive version is available at www.blackwell-synergy.com
Date Deposited: 15 Oct 2007 03:41
Last Modified: 18 Nov 2014 03:23
URI: http://eprints.utas.edu.au/id/eprint/2099
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