Heritability and social brood effects on personality in juvenile and adult life-history stages in a wild passerine
Heritability and social brood effects on personality in juvenile and adult life-history stages in a wild passerine
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DOI：
10.1111/jeb.13197
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发表时间：
2018-01-01
影响因子：
2.1
通讯作者：
Burke，T.
中科院分区：
文献类型：
--
作者：
Winney，I. S.;Schroeder，J.;Burke，T.
进化如何导致群体中行为表型（性格）的变异？了解人格是否是可遗传的，以及它在多大程度上受到社会环境的影响，对于理解其进化意义至关重要，但很少有估计是从自然人群中获得的。我们在野生家雀的纯种种群中追踪了不同生活史阶段的三种行为特征。使用定量遗传方法，我们证明了遗传性在成人的探索，并在雏鸟活动后占固定的影响，但不是在成人大胆。我们没有检测到任何性状的母亲的影响，但我们确实检测到雏鸟活动的社会育雏效果。大胆，探索和雏鸟活动在这个人口没有形成一个行为综合征，这表明选择可以独立地作用于这些行为特征在这个物种，虽然我们没有发现一致的支持表型选择这些特征。我们的工作表明，可重复的行为可以在其遗传性和社会环境影响人格特质。未来的努力可以区分人格特质在遗传性上的差异，因为它们在表型的进化中发挥了特定的功能作用，或者因为我们对人格和行为稳定性的概念需要修改。
How has evolution led to the variation in behavioural phenotypes (personalities) in a population? Knowledge of whether personality is heritable, and to what degree it is influenced by the social environment, is crucial to understanding its evolutionary significance, yet few estimates are available from natural populations. We tracked three behavioural traits during different life‐history stages in a pedigreed population of wild house sparrows. Using a quantitative genetic approach, we demonstrated heritability in adult exploration, and in nestling activity after accounting for fixed effects, but not in adult boldness. We did not detect maternal effects on any traits, but we did detect a social brood effect on nestling activity. Boldness, exploration and nestling activity in this population did not form a behavioural syndrome, suggesting that selection could act independently on these behavioural traits in this species, although we found no consistent support for phenotypic selection on these traits. Our work shows that repeatable behaviours can vary in their heritability and that social context influences personality traits. Future efforts could separate whether personality traits differ in heritability because they have served specific functional roles in the evolution of the phenotype or because our concept of personality and the stability of behaviour needs to be revised.