Population genetics of ectoparasitic mites suggest arms race with honeybee hosts
Population genetics of ectoparasitic mites suggest arms race with honeybee hosts
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DOI：
10.1038/s41598-019-47801-5
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发表时间：
2019-08-06
影响因子：
4.6
通讯作者：
Locke, Barbara
中科院分区：
文献类型：
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作者：
Beaurepaire, Alexis L.;Moro, Arrigo;Locke, Barbara
狄斯瓦螨（Varroa destructor）是全球蜜蜂（Apis mellifera）最严重的生物威胁，通常在几年内导致蜂群死亡。虽然众所周知，少数A.尽管意大利蜜蜂种群通过自然选择的方式在螨侵染中存活下来，但螨适应的可能作用仍不清楚。为了研究螨类种群对寄主适应性的潜在变化，研究了抗螨A.对瑞典哥特兰岛的意大利蜜蜂种群进行了研究。通过比较在这些菌落中收集的螨，以及在历史（2009年）和当前（2017/2018年）样本中从邻近螨易感菌落中收集的螨，评估时空遗传变化。结果表明，在本研究的时间范围内的螨种群的遗传结构的显着变化。这些变化在侵染抗螨蜜蜂群体的V. destructor群体中比在螨易感群体中更明显。这些结果表明，V. destructor种群是往复的，在共同进化的军备竞赛，选择压力诱导的蜜蜂主机。我们的数据揭示了对A. mellifera及其主要寄生虫。
The ectoparasitic mite, Varroa destructor, is the most severe biotic threat to honeybees (Apis mellifera) globally, usually causing colony death within a few years without treatments. While it is known that a few A. mellifera populations survive mite infestations by means of natural selection, the possible role of mite adaptations remains unclear. To investigate potential changes in mite populations in response to host adaptations, the genetic structure of V. destructor in the mite-resistant A. mellifera population on Gotland, Sweden, was studied. Spatio-temporal genetic changes were assessed by comparing mites collected in these colonies, as well as from neighboring mite-susceptible colonies, in historic (2009) and current (2017/2018) samples. The results show significant changes in the genetic structure of the mite populations during the time frame of this study. These changes were more pronounced in the V. destructor population infesting the mite-resistant honeybee colonies than in the mite-susceptible colonies. These results suggest that V. destructor populations are reciprocating, in a coevolutionary arms race, to the selection pressure induced by their honeybee host. Our data reveal exciting new insights into host-parasite interactions between A. mellifera and its major parasite.