Phenotypic and genetic integration of personality and growth under competition in the sheepshead swordtail, Xiphophorus birchmanni.
Phenotypic and genetic integration of personality and growth under competition in the sheepshead swordtail, Xiphophorus birchmanni.
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DOI：
10.1111/evo.13398
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发表时间：
2018-01
期刊：
影响因子：
--
通讯作者：
Wilson AJ
中科院分区：
文献类型：
--
作者：
Boulton K;Walling CA;Grimmer AJ;Rosenthal GG;Wilson AJ
对包括食物、物理空间和潜在配偶在内的资源的竞争是形成个体表型和适应性变化的基本生态过程。竞争能力的进化，特别是社会优势，取决于因果性状之间的遗传（共）变异（例如，行为）或结果（例如，（二）竞争性成果。如果显性是可遗传的，它将对资源依赖性状产生直接和间接遗传效应（IGE）。后者被认为会对进化造成限制，因为赢家必然以输家为代价获得资源。我们在羊头剑尾鱼，剑尾鱼birchmanni，调查的行为，大小，生长和生存的影响，在人口中的竞争。然后，我们应用定量遗传分析来确定（i）竞争是否导致行为与生活史的表型和/或遗传整合，以及（ii）IGE限制生活史进化的潜力。在高度竞争下，大小、生长和存活率都降低了。雄性优势是可重复的，优势个体表现出更高的生长和生存。表型协方差的加性遗传贡献是显着的，与G矩阵在很大程度上概括表型关系。社会优势有一个低的，但显着的遗传力，是强烈的遗传与大小和增长。假设生长对优势的因果依赖性，隐藏的IGE将因此降低进化潜力。
Competition for resources including food, physical space, and potential mates is a fundamental ecological process shaping variation in individual phenotype and fitness. The evolution of competitive ability, in particular social dominance, depends on genetic (co)variation among traits causal (e.g., behavior) or consequent (e.g., growth) to competitive outcomes. If dominance is heritable, it will generate both direct and indirect genetic effects (IGE) on resource‐dependent traits. The latter are expected to impose evolutionary constraint because winners necessarily gain resources at the expense of losers. We varied competition in a population of sheepshead swordtails, Xiphophorus birchmanni, to investigate effects on behavior, size, growth, and survival. We then applied quantitative genetic analyses to determine (i) whether competition leads to phenotypic and/or genetic integration of behavior with life history and (ii) the potential for IGE to constrain life history evolution. Size, growth, and survival were reduced at high competition. Male dominance was repeatable and dominant individuals show higher growth and survival. Additive genetic contributions to phenotypic covariance were significant, with the G matrix largely recapitulating phenotypic relationships. Social dominance has a low but significant heritability and is strongly genetically correlated with size and growth. Assuming causal dependence of growth on dominance, hidden IGE will therefore reduce evolutionary potential.
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影响因子：
2.4
作者：
Dingemanse, NJ;de Goede, P
通讯作者：
de Goede, P
DOI：
10.1007/s00359-009-0469-9
发表时间：
2009-10-01
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