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Multiple Mating, Sperm Competition, and Meiotic Drive

Show simple item record Haig, David en_US Bergstrom, Carl T. en_US 2004-11-04T05:54:01Z en_US 2007-06-13T19:58:32Z 2004-11-04T05:54:01Z en_US 2007-06-13T19:58:32Z 1995 en_US
dc.identifier.citation Haig, D. and C. T. Bergstrom. 1995. Journal of Evolutionary Biology 8:265-282. en_US
dc.identifier.issn 1010-061X en_US
dc.identifier.uri en_US
dc.description.abstract Most discussions of "sperm competition" have ignored the potential for competition among the different sperm genotypes present in the ejaculate of a single male. Rivalry within ejaculates may limit cooperation among the members of an ejaculate when they compete with sperm produced by other males. A gene that gains an advantage in competition within an ejaculate (a segregation distorter) may increase in frequency even if it is associated with significant costs to organismal fitness. Therefore, selection will favor genes expressed in males that suppress competition within ejaculates. This may explain why sperm function is largely controlled by the diploid genotypes of the male progenitor, rather than by the genotypes of individual haploid sperm. Multiple mating by females will reduce the relative advantage of a segregation distorter whenever the distorter impairs the competitive effectiveness of the ejaculates in which it occurs. If the distorter is associated with costs to organismal fitness, selection will favor female mating behavior that reduces the distorter's equilibrium frequency. Competition within ejaculates may thus be one reason why females choose to mate with multiple males. en_US
dc.format.extent 1207902 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en en_US
dc.publisher Blackwell Publishing LTD en_US
dc.subject Meiotic drive en_US
dc.subject sperm competition en_US
dc.subject spermatogenesis en_US
dc.title Multiple Mating, Sperm Competition, and Meiotic Drive en_US
dc.type Article en_US

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