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No evidence for female discrimination against male house mice carrying a selfish genetic element 被引量:1
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作者 Andreas SUTTER anna k. lindholm 《Current Zoology》 SCIE CAS CSCD 2016年第6期675-685,共11页
Meiotic drivers distort transmission to the next generation in their favor, with detrimental effects on the fitness of their homologues and the rest of the genome. Male carriers of meiotic drivers commonly inflict cos... Meiotic drivers distort transmission to the next generation in their favor, with detrimental effects on the fitness of their homologues and the rest of the genome. Male carriers of meiotic drivers commonly inflict costs on their mates through genetic incompatibility, reduced fecundity, or biased brood sex ratios. Given these costs, evidence for female discrimination against male carriers is surprisingly rare. One of few examples is the t haplotype in house mice, a meiotic driver that shows strong transmission distortion in males and is typically homozygote lethal. As a consequence, mating between 2 t heterozygous (+/t) mice leads to high embryo mortality. Previous experiments showing that+/t females avoid this incompatibility cost by preferring +/+ versus +/t males have inferred preference based on olfactory cues or brief social interactions. Evidence from mating contexts in laboratory settings and semi-natural populations has been inconclusive. Here, we investigated female choice from a large number of no-choice mating trials. We found no evidence for discrimination against+/t males based on mating, remating, and copulatory behavior. Further, we found no evidence for avoidance of incompatibility through selective interactions between game- tes. The likelihood of mating showed significant effects of female weight and genotype, suggesting that our test paradigm enabled females to exhibit mate choice. We discuss the strengths and limitations of our approach. By explicitly considering selection at both the individual and gene level, we argue why precopulatory female discrimination by+/t females may be less evolutionarily stable than discrimination by all females based on postcopulatory mechanisms. 展开更多
关键词 cryptic female choice female preference indirect benefits mate choice segregation distortion t haplotype
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The evolutionary consequences of selfish genetic elements
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作者 anna k. lindholm Tom A.R. PRICE 《Current Zoology》 SCIE CAS CSCD 2016年第6期655-658,共4页
The traditional view of the genome was once that it is broadly cooperative, with all genes working together amicably to improve the success of the individual as a whole. Benefits to the individual, after all, benefit ... The traditional view of the genome was once that it is broadly cooperative, with all genes working together amicably to improve the success of the individual as a whole. Benefits to the individual, after all, benefit all the component genes, as fair Mendelian inheritance ensures that all the genes and alleles a parent carries are equally likely to be inherited by an offspring. However, more detailed studies of inheritance have shown that this rosy view of cooperation within the genome is untrue. Instead, many genes act selfishly, manipulating gametogenesis to bias transmission in their favor (Butt and Trivers 2006). This increases their representation in offspring at a cost to the fitness of the individual and the cooperative genes. 展开更多
关键词 遗传因素 进化 基因组 孟德尔遗传 等位基因 合作 多基因 后代
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