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Digest: Exposing the role of rare alleles in inbreeding depression in monkeyflower
Evolution ( IF 3.3 ) Pub Date : 2020-02-04 , DOI: 10.1111/evo.13931
Asher I. Hudson 1
Affiliation  

Outcrossing is maintained in many hermaphroditic species despite theoretical work suggesting that alleles increasing selfing should invade outcrossing populations. Brown and Kelly (2019) identify reasons why this may not have occurred in an outcrossing population of monkeyflower, namely that inbreeding depression causes strong reductions in fitness, resulting in selection for the maintenance of outcrossing. They find that genetic load imposed by rare alleles is inversely correlated with fitness‐associated traits, providing evidence that recessive, deleterious alleles contribute to inbreeding depression.

中文翻译:

文摘:揭示稀有等位基因在猴花近交衰退中的作用

尽管理论工作表明增加自交的等位基因应该侵入异交种群,但在许多雌雄同体物种中仍保持异交。Brown 和 Kelly (2019) 确定了为什么在猴花的异交种群中可能不会发生这种情况的原因,即近交抑制导致适应性强烈降低,从而导致选择维持异交。他们发现稀有等位基因施加的遗传负荷与健康相关性状呈负相关,这提供了隐性、有害等位基因导致近交衰退的证据。
更新日期:2020-02-04
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