Glacial refugia: sanctuaries for allelic richness, but not for gene diversity.
Glacial refugia: sanctuaries for allelic richness, but not for gene diversity.
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DOI：
10.1016/s0169-5347(01)02163-2
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发表时间：
2001-06
影响因子：
16.8
通讯作者：
A. Widmer;C. Lexer
中科院分区：
文献类型：
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作者：
A. Widmer;C. Lexer
冰川避难所通常被认为比冰川消退后被殖民的地区具有更高水平的遗传多样性，因为殖民通常只涉及少数人。Compset等人的一篇新论文通过展示欧洲山毛榉中更复杂的情况来挑战这一期望，对于这种情况，新殖民地区的遗传多样性的一些指标高于避难所。理解这一违反直觉的结果的关键在于用于测量遗传多样性的估计量和在冰后期的进化过程中影响这些估计量的过程。
Glacial refugia are generally expected to harbor higher levels of genetic diversity than are areas that have been colonized after the retreat of the glaciers because colonization often involves only a few individuals. A new paper by Compset al.challenges this expectation by demonstrating a more complex situation in the European beechFagus sylvatica, for which some measures of genetic diversity are higher in newly colonized areas than in refugia. The key to understanding this counter-intuitive result rests both in the estimators used to measure genetic diversity and in the processes affecting these estimators during postglacial recolonization.