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Differential genotypic effects of sexual trait size on offspring mating success and viability

Polak, Michal, Fanson, Kerry V., Taylor, Phillip W. and Yap, Sarsha 2016, Differential genotypic effects of sexual trait size on offspring mating success and viability, Behavioral ecology, vol. 27, no. 2, pp. 444-451, doi: 10.1093/beheco/arv174.

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Title Differential genotypic effects of sexual trait size on offspring mating success and viability
Author(s) Polak, Michal
Fanson, Kerry V.
Taylor, Phillip W.
Yap, Sarsha
Journal name Behavioral ecology
Volume number 27
Issue number 2
Start page 444
End page 451
Total pages 8
Publisher Oxford University Press
Place of publication Oxford, Eng.
Publication date 2016
ISSN 1045-2249
1465-7279
Keyword(s) good genes sexual selection
indicator models
mating success
offspring viability
sex combs
Summary Indicator models of sexual selection predict that females mating with the most ornamented males should produce offspring withenhanced expression of fitness-related traits, such as overall vigor and viability. Empirical support for this prediction, however, islimited. We quantified the effects of a heritable and condition-dependent secondary sexual trait on offspring performance traits inDrosophila bipectinata Duda (Diptera: Drosophilidae). Forty-eight genetic (isofemale) lines were extracted from a natural population,reared in a common environment, and characterized in terms of sex comb size. We measured pupal viability and adult mating successamong the progeny of the 5 lines with the largest combs (high line category) and the 5 lines with the smallest combs (low linecategory). The high line category produced offspring that were significantly more viable than the low line category, and this advantageheld across 2 developmental temperatures. In contrast, there was no effect of line category on male mating success, although at theindividual-level, comb size was significantly positively correlated with mating success. Our results indicate that the relative size ofthe D. bipectinata sex comb taps genotypic properties that enhance offspring fitness in a trait-specific manner. Thus, distinct proximatemechanisms likely underlie relationships between secondary sexual trait expression and different performance traits in offspring,offering a possible explanation for inconsistent support for the existence of indirect benefits in sexual selection.
Language eng
DOI 10.1093/beheco/arv174
Field of Research 0602 Ecology
0603 Evolutionary Biology
0608 Zoology
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2015, The Authors
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091099

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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