Genetic diversity and differentiation of the extremely dwarf Ficus tikoua in Southwestern China
Genetic diversity and differentiation of the extremely dwarf Ficus tikoua in Southwestern China
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西南地区极矮榕遗传多样性与分化
DOI：
10.1016/j.bse.2011.06.006
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发表时间：
2011-08-01
影响因子：
1.6
通讯作者：
Chen, Xiao-Yong
中科院分区：
文献类型：
--
作者：
Chen, Yan;Jiang, Zhu-Xi;Chen, Xiao-Yong
无花果黄蜂寿命短，飞行能力弱，它们的远距离传播依赖于进入树冠上方快速流动的空气的能力。因此，无花果物种的生长形式可能会影响无花果胡蜂的传播。我们利用6个微卫星标记检测了中国雌雄异株无花果（Ficus tikoua）群体的基因流。在种群内发现了中等的遗传多样性。6个居群间分化率（F(ST) = 0.196, p < 0.001）高于其他雌雄异株无花果，且各居群间分化显著，表明存在潜在的限制性基因流。这进一步通过显著的距离隔离模式（p = 0.039）得到了证明，因为种群之间的低基因流动需要平衡遗传漂变的轻微影响，因为弓形虫在当地很常见。受限制的基因流动表明，生长形式可能决定了无花果物种间基因流动的差异。(C) 2011 Elsevier Ltd.版权所有。
Fig wasps are short-lived, weak fliers, and their long-distance dispersal depends on the ability to enter fast-flowing air above the canopy. Therefore, growth form of fig species may affect fig wasps' dispersal. We employed six microsatellite markers to examine gene flow in Chinese populations of the dioecious Ficus tikoua, a prostrate shrub with figs partially buried in the soil. Moderate genetic diversity was found within populations of E tikoua. Differentiation among six E tikoua populations (F(ST) = 0.196, p < 0.001) was higher than those of other dioecious figs, and significant differentiation was found between each pair of populations, indicating potential restricted gene flow. This was further demonstrated by significant isolation-by-distance pattern (p = 0.039), because low gene flow among population was needed to balance the minor effect of genetic drift, given E tikoua was locally common. Restricted gene flow suggests that growth form may determine differences in gene flow between fig species. (C) 2011 Elsevier Ltd. All rights reserved.