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Sexual selection in the cricket Gryllus bimaculatus : no good genes?

机译：biGryllus bimaculatus的性别选择：没有好的基因？

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Recent studies have suggested that females of the field cricket Gryllus bimaculatus exercise post-copulatory choice over the paternity of their offspring. There is evidence that these choices are made in relation to the genetic compatibility of mates rather than their absolute quality, but the magnitude of heritable differences in males has not been thoroughly examined. Using a half-sib breeding design we measured additive genetic variance and dam effects in a suite of reproductive and non-reproductive traits. Both components explained relatively little of the phenotypic variance across traits. The dam component in our design contains variance caused by both maternal effects and dominance. If maternal effects are negligible as suggested by previous studies, our data suggest that dominance variance is an important source of variation in these traits. The lack of additive genetic variation, but possible existence of large amounts of non-additive genetic variation is consistent with the idea that female mate choice and multiple mating may be driven by differences in genetic compatibility between potential mates rather than by differences in genetic quality.
机译：最近的研究表明，田的雌性在其后代的父系上行使交配后的选择。有证据表明，这些选择是根据配偶的遗传相容性而不是其绝对品质决定的，但是尚未完全研究雄性遗传差异的大小。使用半同胞繁殖设计，我们测量了一组生殖和非生殖性状的加性遗传方差和大坝效应。两种成分都解释了相对较少的性状表型差异。我们设计中的水坝组成部分包含由母体效应和优势引起的差异。如果以前的研究表明母体效应可以忽略不计，我们的数据表明优势变异是这些性状变异的重要来源。缺乏加性遗传变异，但可能存在大量的非加性遗传变异，符合这样的观念，即女性配偶的选择和多重交配可能是由潜在配偶之间的遗传相容性差异而非遗传质量的差异所驱动。

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