The coadaptation of parental supply and offspring demand
The coadaptation of parental supply and offspring demand
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DOI：
10.1086/491687
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发表时间：
2005-10-01
影响因子：
2.9
通讯作者：
Moore, AJ
中科院分区：
文献类型：
--
作者：
Kölliker, M;Brodie, ED;Moore, AJ
为提供照料而进行的亲子互动的演变通常被解释为解决了相互冲突的选择压力的表型结果。然而，父母的照顾和后代的招揽预计会具有复杂的遗传模式。在这里，我们提出了亲子相互作用的定量遗传模型，使我们能够研究冲突解决状态的进化维持。我们表明，后代的招揽和父母的供给预计将通过相互适应而在遗传上相关，并且它们的遗传结构是由选择模式与调节供给和需求的直接机制之间的相互作用决定的。当选择主要取决于后代的招揽时，我们的模型表明，如果供给减少了招揽，那么供给和招揽之间的遗传相关性通常是正的。相反，当选择主要取决于父母的供给时，只要父母对后代的需求表现出积极的反应，相关性大多是负的。对涉及家庭互动的性状遗传结构的实证估计符合这些预测。我们的模型展示了亲子相互作用的进化维持如何导致不同的相互适应模式，并为物种内部和物种之间的家庭相互作用的多样性提供了解释。
The evolution of parent-offspring interactions for the provisioning of care is usually explained as the phenotypic outcome of resolved conflicting selection pressures. However, parental care and offspring solicitation are expected to have complex patterns of inheritance. Here we present a quantitative genetic model of parent-offspring interactions that allows us to investigate the evolutionary maintenance of a state of resolved conflict. We show that offspring solicitation and parental provisioning are expected to become genetically correlated through coadaptation and that their genetic architecture is dictated by an interaction between patterns of selection and the proximate mechanisms regulating supply and demand. When selection is predominately on offspring solicitation, our model suggests that the genetic correlations between provisioning and solicitation are usually positive if provisioning reduces solicitation. Conversely, when selection is predominately on parental provisioning, the correlations are mostly negative as long as parents show a positive response to offspring demand. Empirical estimates of the genetic architecture of traits involved in family interactions fit these predictions. Our model demonstrates how the evolutionary maintenance of parent-offspring interactions can result in variable patterns of coadaptation, and it provides an explanation for the diversity of family interactions within and among species.