Publication Date:
2009-06-27
Description:
Despite the costs of mating, females of most taxa mate with multiple males. Polyandrous females are hypothesized to gain genetic benefits for their offspring, but this assumes paternity bias favoring male genotypes that enhance offspring viability. We determined net male genetic effects on female and offspring fitness in a seed beetle and then tested whether fertilization success was biased in favor of high-quality male genotypes in double mating experiments. Contrary to expectations, high-quality male genotypes consistently had a lower postmating fertilization success in two independent assays. Our results imply that sexually antagonistic adaptations have a major and unappreciated influence on male postmating fertilization success. Such genetic variation renders indirect genetic benefits an unlikely driver of the evolution of polyandry.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bilde, Trine -- Foged, Anne -- Schilling, Nadia -- Arnqvist, Goran -- New York, N.Y. -- Science. 2009 Jun 26;324(5935):1705-6. doi: 10.1126/science.1171675.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ecology and Evolution, Evolutionary Biology Centre, University of Uppsala, Norbyvagen 18d, SE - 752 36 Uppsala, Sweden. trine.bilde@biology.au.dk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19556506" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Beetles/*genetics/*physiology
;
Biological Evolution
;
Crosses, Genetic
;
Female
;
Fertilization
;
Genetic Phenomena
;
Genetic Variation
;
*Genotype
;
Male
;
*Mating Preference, Animal
;
Reproduction
;
*Selection, Genetic
;
*Sexual Behavior, Animal
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
