Genetic Structure and Potential Environmental Determinants of Local Genetic Diversity in Japanese Honeybees (Apis cerana japonica).
Genetic Structure and Potential Environmental Determinants of Local Genetic Diversity in Japanese Honeybees (Apis cerana japonica).
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DOI：
10.1371/journal.pone.0167233
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Taki H
中科院分区：
文献类型：
--
作者：
Nagamitsu T;Yasuda M;Saito-Morooka F;Inoue MN;Nishiyama M;Goka K;Sugiura S;Maeto K;Okabe K;Taki H
蜜蜂数量的下降最近引起了人们的关注。尽管下降的原因尚不清楚，但环境因素可能是造成这种情况的原因。我们重点研究日本当地野生蜜蜂（Apis cerana japonica）种群的潜在环境决定因素。该亚种的线粒体 DNA 序列几乎没有遗传变异，核位点的遗传变异尚不清楚。我们估计了父亲和母亲的核微卫星基因型中当地遗传多样性的遗传结构和环境决定因素，这是从 139 个地点收集的工人中推断出来的。父亲和母亲的基因型表现出距离较弱的隔离性和可忽略不计的遗传结构。日本中部的当地遗传多样性很高，向周边地区递减，并且取决于该地点的气候和土地利用特征。当地遗传多样性随着年降水量的增加而降低，随着城市和水田面积比例的增加而增加。天然林面积的积极影响（在农场的觅食者丰度方面也已观察到），但在当地遗传多样性方面并未发现。研究结果表明，中华蜜蜂在其主要分布范围内形成了通过基因流连接的单一种群，并且气候和景观特性可能影响其当地的遗传多样性。
Declines in honeybee populations have been a recent concern. Although causes of the declines remain unclear, environmental factors may be responsible. We focused on the potential environmental determinants of local populations of wild honeybees, Apis cerana japonica, in Japan. This subspecies has little genetic variation in terms of its mitochondrial DNA sequences, and genetic variations at nuclear loci are as yet unknown. We estimated the genetic structure and environmental determinants of local genetic diversity in nuclear microsatellite genotypes of fathers and mothers, inferred from workers collected at 139 sites. The genotypes of fathers and mothers showed weak isolation by distance and negligible genetic structure. The local genetic diversity was high in central Japan, decreasing toward the peripheries, and depended on the climate and land use characteristics of the sites. The local genetic diversity decreased as the annual precipitation increased, and increased as the proportion of urban and paddy field areas increased. Positive effects of natural forest area, which have also been observed in terms of forager abundance in farms, were not detected with respect to the local genetic diversity. The findings suggest that A. cerana japonica forms a single population connected by gene flow in its main distributional range, and that climate and landscape properties potentially affect its local genetic diversity.
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