Behavioral plasticity and G × E of reproductive tactics in Nicrophorus vespilloides burying beetles.
Behavioral plasticity and G × E of reproductive tactics in Nicrophorus vespilloides burying beetles.
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DOI：
10.1111/evo.12619
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发表时间：
2015-04
期刊：
影响因子：
--
通讯作者：
Royle NJ
中科院分区：
文献类型：
--
作者：
Carter MJ;Head ML;Moore AJ;Royle NJ
表型可塑性在性状进化中起着重要作用，有助于适应快速的环境变化。然而，个体水平上的可塑性变化，以及这种可塑性背后的遗传基础，很少被量化为行为特征。替代行为繁殖策略是交配系统的关键组成部分，但通常不被认为是在表型可塑性框架内（即反应规范）。本文采用人为选择重复交配率的品系，研究了雄性微粉蚧（Nicrophorus vespilloides）埋虫生殖行为（包括信号行为）变异的遗传（gxe）来源，以及个体体型在社会环境变化反应中的作用。结果表明，体型影响个体对社会环境变化的信号行为反应。此外，雄性对所经历的社会环境质量变化（焦点雄性与其竞争对手的相对尺寸）的反应存在gxe。这表明信号行为的可塑性和社会敏感性的个体差异可以在交配行为投资选择的反应中进化，选择高交配投资的雄性具有更高的社会敏感性。
Phenotypic plasticity is important in the evolution of traits and facilitates adaptation to rapid environmental changes. However, variation in plasticity at the individual level, and the heritable basis underlying this plasticity is rarely quantified for behavioral traits. Alternative behavioral reproductive tactics are key components of mating systems but are not often considered within a phenotypic plasticity framework (i.e., as reaction norms). Here, using lines artificially selected for repeated mating rate, we test for genetic (G × E) sources of variation in reproductive behavior of male Nicrophorus vespilloides burying beetles (including signaling behavior), as well as the role of individual body size, in responsiveness to changes in social environment. The results show that body size influences the response of individuals’ signaling behavior to changes in the social environment. Moreover, there was G × E underlying the responses of males to variation in the quality of social environment experienced (relative size of focal male compared to his rival). This shows that individual variation in plasticity and social sensitivity of signaling behavior can evolve in response to selection on investment in mating behavior, with males selected for high mating investment having greater social sensitivity.
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