A soft selective sweep during rapid evolution of gentle behaviour in an Africanized honeybee.

A soft selective sweep during rapid evolution of gentle behaviour in an Africanized honeybee.
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DOI:
10.1038/s41467-017-01800-0
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发表时间:
2017-11-16
影响因子:
16.6
通讯作者:
Zhang G
Zhang G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Avalos A;Pan H;Li C;Acevedo-Gonzalez JP;Rendon G;Fields CJ;Brown PJ;Giray T;Robinson GE;Hudson ME;Zhang G

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1994年,高度侵略性的非洲化蜜蜂(AHB)入侵波多黎各(PR),在许多地方取代了温和的欧洲蜜蜂(EHB)。温和的AHB(GAHB),在世界其他地方都不为人所知,随后在岛上进化了几代人。在这里,我们对gAHB和EHB群体的整个基因组进行了测序,以及北美的AHB群体,这可能是PR上创始人AHB的来源。我们发现,尽管在立地变异上进行了选择,但在温和行为的进化之后,gAHB保持了高水平的遗传多样性。我们观察到具有显著选择特征的多个基因组座位。在新栖息地的殖民过程中的快速进化可能会导致特征的重大变化,如形态或着色特征,通常由一个或多个主要遗传位点控制。在这里,我们描述了一种软的选择性扫描,作用于整个基因组的多个基因座,发生在行为特征的快速进化过程中,并且可能参与了这种行为特征的快速进化。非洲蜜蜂(AHB)是出了名的好斗,但在波多黎各,它们的表型很温和。在这里,阿瓦洛斯等人。这表明波多黎各AHB人群中的几个基因座存在软的选择性扫描,并表明在温和行为的快速演变中发挥了作用。
Highly aggressive Africanized honeybees (AHB) invaded Puerto Rico (PR) in 1994, displacing gentle European honeybees (EHB) in many locations. Gentle AHB (gAHB), unknown anywhere else in the world, subsequently evolved on the island within a few generations. Here we sequence whole genomes from gAHB and EHB populations, as well as a North American AHB population, a likely source of the founder AHB on PR. We show that gAHB retains high levels of genetic diversity after evolution of gentle behaviour, despite selection on standing variation. We observe multiple genomic loci with significant signatures of selection. Rapid evolution during colonization of novel habitats can generate major changes to characteristics such as morphological or colouration traits, usually controlled by one or more major genetic loci. Here we describe a soft selective sweep, acting at multiple loci across the genome, that occurred during, and may have mediated, the rapid evolution of a behavioural trait. Africanized honey bees (AHB) are notoriously aggressive, but in Puerto Rico they have a ‘gentle’ phenotype. Here, Avalos et al. show that there has been a soft selective sweep at several loci in the Puerto Rican AHB population and suggest a role in the rapid evolution of gentle behaviour.
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