Document Detail


Social common mole-rats enhance outbreeding via extra-pair mating.
MedLine Citation:
PMID:  17287179     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Females in many species engage in matings with males that are not their social mates. These matings are predicted to increase offspring heterozygosity and fitness, and thereby prevent the deleterious effects of inbreeding. We tested this hypothesis in a cooperative breeding mammal, the common mole-rat Cryptomys hottentotus hottentotus. Laboratory-based studies suggested a system of strict social monogamy, while recent molecular studies indicate extensive extra-pair paternity despite colonies being founded by an outbred pair. Our data show that extra-pair and within-colony breeding males differed significantly in relatedness to breeding females, suggesting that females may gain genetic benefits from breeding with non-resident males. Extra-colony male mating success was not based on heterozygosity criteria at microsatellite loci; however, litters sired by extra-colony males exhibited increased heterozygosity. While we do not have the data that refute a relationship between individual levels of inbreeding (Hs) and fitness, we propose that a combination of both male and female factors most likely explain the adaptive significance of extra-pair mating whereby common mole-rats maximize offspring fitness by detecting genetic compatibility with extra-pair mates at other key loci, but it is not known which sex controls these matings.
Authors:
Jacqueline M Bishop; Colleen O'Ryan; Jennifer U M Jarvis
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biology letters     Volume:  3     ISSN:  1744-9561     ISO Abbreviation:  Biol. Lett.     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-05-23     Completed Date:  2008-08-29     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  101247722     Medline TA:  Biol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  176-9     Citation Subset:  IM    
Affiliation:
Department of Zoology, University of Cape Town, Private Bag X3, Rondebosch 8001, South Africa. jbishop@botzoo.uct.ac.za
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MeSH Terms
Descriptor/Qualifier:
Animals
Female
Heterozygote
Male
Microsatellite Repeats / genetics
Mole Rats / physiology*
Reproduction / physiology*
Sexual Behavior, Animal / physiology*
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