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1 January 2005 THE ROLE OF HALDANE'S RULE IN SEX ALLOCATION
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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.

Mats Olsson, Thomas Madsen, Tobias Uller, Erik Wapstra, and Beata Ujvari "THE ROLE OF HALDANE'S RULE IN SEX ALLOCATION," Evolution 59(1), 221-225, (1 January 2005). https://doi.org/10.1554/04-474
Received: 1 August 2004; Accepted: 1 November 2004; Published: 1 January 2005
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