In Fisher's model of sexual selection, a female preference for a male trait spreads together with the trait because their genetic bases become correlated. This can be interpreted as a “greenbeard” system: a preference gene, by inducing a female to mate with a trait‐bearing male, favors itself because the male is disproportionately likely also to carry the preference gene. Here, we use this logic to argue that Fisherian sexual selection in diploids proceeds via two channels: (i) trait‐bearing males are disproportionately the product of matings between preference‐bearing mothers and trait‐bearing fathers, and thus trait and preference genes are correlated “in trans”; (ii) trait and preference genes come into gametic phase disequilibrium, and thus are correlated “in cis.” Gametic phase disequilibrium is generated by three distinct mechanisms that we identify. The trans channel does not operate when sexual selection is restricted to the haploid phase, and therefore represents a fundamental difference between haploid and diploid models of sexual selection. We show that the cis and trans channels contribute equally to the spread of the preference when recombination between the preference and trait loci is free, but that the trans channel is substantially more important when linkage is tight.

中文翻译：

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论渔夫性选择的逻辑

在费舍尔的性选择模型中，女性对男性特征的偏好与该特征一起传播，因为它们的遗传基础变得相关。这可以解释为“绿胡子”系统：偏好基因通过诱导雌性与具有特征的雄性交配而偏袒自己，因为雄性也携带偏好基因的可能性不成比例。在这里，我们使用这个逻辑来论证二倍体中的费舍尔性选择通过两个渠道进行：(i) 带有特征的雄性不成比例地是带有偏好的母亲和带有特征的父亲之间交配的产物，因此性状和偏好基因是相关的“反式”；(ii) 性状和偏好基因进入配子阶段不平衡，因此“顺式”相关。” 配子相不平衡是由我们确定的三种不同机制产生的。当性选择仅限于单倍体阶段时，反式通道不起作用，因此代表了性选择的单倍体和二倍体模型之间的根本区别。我们表明，当偏好和性状基因座之间的重组自由时，顺式和反式通道对偏好的传播贡献相同，但当链接紧密时，反式通道实际上更为重要。