Genetic Variation in Male Aggression Is Influenced by Genotype of Prior Social Partners in Drosophila melanogaster
Genetic Variation in Male Aggression Is Influenced by Genotype of Prior Social Partners in Drosophila melanogaster
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DOI：
10.1086/729463
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发表时间：
2024-05-01
影响因子：
2.9
通讯作者：
Saltz，Julia B.
中科院分区：
文献类型：
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作者：
Hutchins，Marina;Douglas，Tracy;Saltz，Julia B.
社会行为可以通过间接遗传效应（IGEs）受到相互作用个体基因型的影响，也可以表现出发育可塑性。我们研究了发育性IGEs如何影响雄性黑腹果蝇的攻击性。发育性IGEs描述了前社会伴侣的基因型对后来行为的影响。我们预测，发展性IGEs不能通过简单地延长上下文IGEs随时间的影响来估计，而是对行为有自己独特的影响。在实验的第一天，我们测量了15对基因型配对（雄性）的攻击行为。在第2天，每只雄鼠都与一个新的对手配对，并再次测量攻击行为。我们在实验第一天发现了情境性IGEs，在实验第二天发现了发展性IGEs：第一天伴侣的基因型对焦点个体第二天行为的影响取决于第一天伴侣和焦点男性的基因型身份。重要的是，由于IGEs的存在随着时间的推移而改变，我们系统中的发展性IGEs产生了与情境性IGEs根本不同的动态。这些发现是证明发育性IGEs的第一批经验证据，是将发育性IGEs纳入我们对行为进化的理解的第一步。
Social behaviors can be influenced by the genotypes of interacting individuals through indirect genetic effects (IGEs) and can also display developmental plasticity. We investigated how developmental IGEs, which describe the effects of a prior social partner’s genotype on later behavior, can influence aggression in maleDrosophila melanogaster. We predicted that developmental IGEs cannot be estimated by simply extending the effects of contextual IGEs over time and instead have their own unique effects on behavior. On day 1 of the experiment, we measured aggressive behavior in 15 genotypic pairings (males). On day 2, each of the males was paired with a new opponent, and aggressive behavior was again measured. We found contextual IGEs on day 1 of the experiment and developmental IGEs on day 2 of the experiment: the influence of the day 1 partner’s genotype on the focal individual’s day 2 behavior depended on the genotypic identity of both the day 1 partner and the focal male. Importantly, the developmental IGEs in our system produced fundamentally different dynamics than the contextual IGEs, as the presence of IGEs was altered over time. These findings represent some of the first empirical evidence demonstrating developmental IGEs, a first step toward incorporating developmental IGEs into our understanding of behavioral evolution.