Genetic integration of local dispersal and exploratory behaviour in a wild bird
Genetic integration of local dispersal and exploratory behaviour in a wild bird
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DOI：
10.1038/ncomms3362
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发表时间：
2013-08-01
影响因子：
16.6
通讯作者：
Matthysen, Erik
中科院分区：
文献类型：
--
作者：
Korsten, Peter;van Overveld, Thijs;Matthysen, Erik
扩散是自然种群生态和进化动态的主要决定因素。个体在扩散的可能性和距离上有很大的差异，但通常不清楚内在的、可能是遗传的差异在多大程度上起到了作用。在这里，我们提供了第一个明确的经验证据，证明了局部扩散和探索行为的遗传耦合，这是一个关键的“动物个性”特征。利用自由生活的大山雀多代谱系的亲缘关系数据，我们发现了研究区域内局部扩散距离和个体探索新环境的速度的定量遗传变异。此外，我们发现局部扩散距离和探险率之间存在很强的正遗传相关性，尽管表型相关性较弱且不显著。这些发现证明了局部扩散可遗传差异背后潜在的重要行为机制，并突显了扩散和动物个性因选择而协同进化的潜力。
Dispersal is a major determinant of the ecological and evolutionary dynamics of natural populations. Individuals differ greatly in the likelihood and distance of dispersal, but it is generally unclear to what extent intrinsic, possibly genetic, differences contribute. Here we present the first explicit empirical evidence for genetic coupling of local dispersal and exploratory behaviour, a key 'animal personality' trait. Using relatedness data from a multi-generation pedigree of free-living great tits (Parus major), we find quantitative genetic variation for both the distance of local dispersal within our study area and the rate at which individuals explore a novel environment. Moreover, we find a strongly positive genetic correlation between local dispersal distance and exploration rate, despite a weak and non-significant phenotypic correlation. These findings demonstrate a potentially important behavioural mechanism underlying heritable differences in local dispersal and highlight the potential for concerted evolution of dispersal and animal personality in response to selection.