Genetic diversity of Bradysia difformis (Sciaridae: Diptera) populations reflects movement of an invasive insect between forestry nurseries
Genetic diversity of Bradysia difformis (Sciaridae: Diptera) populations reflects movement of an invasive insect between forestry nurseries
复制标题
DOI：
10.1007/s10530-009-9509-1
复制
发表时间：
2010-04-01
影响因子：
2.9
通讯作者：
Wingfield, M. J.
中科院分区：
文献类型：
--
作者：
Hurley, B. P.;Slippers, B.;Wingfield, M. J.
最近首次在南非的林业苗圃中发现了真菌蚊蚋（Bradysia difformis）（蚱科：双翅目）。这种昆虫作为主要且唯一的鞘科昆虫存在于所有主要的林业苗圃中，引发了关于其起源和种群遗传结构的有趣问题。对从南非的四个苗圃群体和欧洲的三个苗圃群体收集的差异芽孢杆菌个体的线粒体 COI 基因的 395 bp 部分进行了分析。南非和欧洲人群之间共有的单倍型表明了历史联系。南非人口表现出较高的遗传多样性和较低的遗传分化。这些模式很可能反映了不同形芽孢杆菌从其起源地多次和/或相对大量地引入南非，以及随后和持续的植物在苗圃之间的移动。
The fungus gnat, Bradysia difformis (Sciaridae: Diptera) has recently been recorded for the first time from South Africa where it has been found in forestry nurseries. The presence of this insect in all the major forestry nurseries as the dominant and only sciarid species raises intriguing questions regarding its origin and population genetic structure. A 395 bp portion of the mitochondrial COI gene was analysed from B. difformis individuals collected from four nursery populations in South Africa and three nursery populations in Europe. Shared haplotypes between South African and European populations indicated a historical connection. South African populations showed high genetic diversity and low genetic differentiation. These patterns most likely reflect multiple and/or relatively large introductions of B. difformis into South Africa from its origin combined with subsequent and continued movement of plants between nurseries.