Strong and weak cross‐sex correlations govern the quantitative‐genetic architecture of social group choice in Drosophila melanogaster

Strong and weak cross‐sex correlations govern the quantitative‐genetic architecture of social group choice in Drosophila melanogaster
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强和弱的跨性别相关性控制着果蝇社会群体选择的数量遗传结构

DOI:
10.1111/evo.13887
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发表时间:
2019
期刊:
影响因子:
3.3
通讯作者:
Saltz, Julia B.
Saltz, Julia B.
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Geiger, Adam P.;Saltz, Julia B.

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当基因型在生态位构建特征上存在差异时,基因型在它们所经历的环境中也会存在差异,这为基因型、环境和行为之间提供了一种新的因果关系。这种生态位构建(或者更准确地说,环境构建)中的遗传变异被预测为对社会环境特别重要,然而控制这种变异的数量遗传参数仍然知之甚少。在这里,我们研究了社会环境构建行为的遗传变异和跨性别遗传相关性。我们关注的是黑腹果蝇(Drosophila melanogaster)的基因变异是否与两性之间的基因变异相关或不相关。基因变异是指在同种果蝇可能存在的食物斑块附近逗留的倾向,以及群体大小偏好(个体在交往时选择的特定群体大小)。在三种选择治疗中,我们发现基因型和性别差异影响了个体在斑块附近停留的时间,以及他们更喜欢的群体规模。我们发现,斑块使用的遗传基础在两性之间是强耦合的,而群体大小偏好的遗传基础在两性之间是完全解耦的。我们将讨论这些发现如何增强和复杂化我们对社会行为的进化遗传学的理解。
When genotypes differ in niche-constructing traits, genotypes are expected to differ in which environments they experience, providing a novel causal relationship between genotypes, environments, and behavior. Such genetic variation in niche construction (or, more precisely, environment construction) is predicted to be especially important for social environments, yet the quantitative-genetic parameters governing such variation are still poorly understood. Here, we examine genetic variation and cross-sex genetic correlations for social environment-constructing behaviors. We focus on whether genetic variation in patch use—the tendency to spend time near food patches where conspecifics may be present—and group-size preference—the specific group size chosen when individuals are affiliating—is correlated or decoupled across sexes in the fruit fly,Drosophila melanogaster. Across three choice treatments, we find genotype and sex differences in how much time individuals spend near patches, and which group sizes they prefer. We find that the genetic basis of patch use is strongly coupled across sexes, whereas the genetic basis of group-size preference is completely decoupled across sexes. We discuss how these findings augment and complicate our understanding of the evolutionary genetics of social behaviors.
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