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首页> 外文期刊>Trends in Ecology & Evolution >Heritable variation and evolution under favourable and unfavourable conditions
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Heritable variation and evolution under favourable and unfavourable conditions

机译:在有利和不利条件下的遗传变异和进化

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摘要

Genetic variability in quantitative traits can change as a direct response to the environmental conditions in which they are expressed. Consequently, similar selection in different environments might not be equally effective in leading to adaptation. Several hypotheses, including recent ones that focus on the historical impact of selection on populations, predict that the expression of genetic variation will increase in unfavourable conditions. However, other hypotheses lead to the opposite prediction. Although a consensus is unlikely, recent Drosophila and bird studies suggest consistent trends for morphological traits under particular conditions.
机译:数量性状的遗传变异性可以作为对表达它们的环境条件的直接响应而改变。因此,在不同环境中进行类似选择可能无法有效地导致适应。几种假设,包括最近针对选择对人口历史影响的假设,预测在不利条件下遗传变异的表达将增加。但是,其他假设导致相反的预测。尽管达成共识的可能性不大,但最近的果蝇和鸟类研究表明,在特定条件下,其形态特征具有一致的趋势。

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