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首页> 外文期刊>Israel Journal of Zoology >Revisiting Heritable Variation and Limits to Species Distribution: Recent Developments
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Revisiting Heritable Variation and Limits to Species Distribution: Recent Developments

机译：重新审视可遗传的变化和物种分布的限制：最新发展

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摘要

There are several evolutionary reasons why species distributions are locally and geographically limited, and these mostly revolve around gene flow and levels of genetic variation in populations. While there has been progress in developing models assessing the impact of gene flow, empirical data on hypotheses about factors limiting distributions remain rare. A few recent plant studies have highlighted that levels of additive genetic variance are not limiting, suggesting a role for gene flow. However, some animal studies, mostly on Drosophila species, have refocused attention on heritable variation as an evolutionary reason for distribution limits. There is a need for comparative studies that examine levels of heritable variation across related species groups with broad and narrow distributions, and also across a range of traits including those likely to be under selection at borders. These studies will help to test specific predictions about the relative importance of genetic variance and gene flow in limiting current borders and also help in predicting the impact of future environmental changes on distribution shifts.
机译：物种分布在局部和地理上有限的进化原因有几个，这些分布主要围绕基因流和人群的遗传变异水平旋转。尽管在开发模型方面取得了进展，评估基因流的影响，但关于限制因素的假设的经验数据仍然很少。最近的一些植物研究强调，添加剂遗传方差的水平并不限制，这表明基因流动起着作用。但是，一些动物研究主要是关于果蝇物种的，已将注意力重新集中在可遗传的变化上，这是分布限制的进化原因。需要进行比较研究，以检查具有广泛和狭窄分布的相关物种群体之间的可遗传变异水平，以及各种特征，包括可能在边界中选择的特征。这些研究将有助于测试有关遗传方差和基因流在限制当前边界中相对重要性的特定预测，并有助于预测未来环境变化对分布转移的影响。

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