Inferences on the population structure and colonization process of the invasive oriental fruit fly, Bactrocera dorsalis (Mendel)
Inferences on the population structure and colonization process of the invasive oriental fruit fly, Bactrocera dorsalis (Mendel)
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DOI：
10.1111/j.1365-294x.2007.03409.x
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发表时间：
2007-09-01
影响因子：
4.9
通讯作者：
Gugliemino, C. R.
中科院分区：
文献类型：
--
作者：
Aketarawong, N.;Bonizzoni, M.;Gugliemino, C. R.
实蝇科的植食性昆虫提供了成功入侵的不同案例。一个例子是东方实蝇（Bactrocera dorsalis ensu stricto），它被认为是亚洲和太平洋地区的主要害虫。已知它具有在各种热带和亚热带地区建立外来种群的潜力。尽管经济风险与一个假定的稳定存在的这种苍蝇，其入侵过程的遗传方面仍然相对未被探索。利用微卫星标记，我们调查了14个地理种群的种群结构和遗传变异，分布在实际物种分布的四个地区：远东亚洲，南亚，东南亚和太平洋地区。聚类和混合的结果，与系统发育和迁移分析，被用来评估种群遗传结构的变化，该物种在其入侵过程中，并建立在不同的地区。该蝇的定殖过程与相对稳定的种群人口结构相关，特别是在密集种植的完整栖息地，如东南亚。在这一领域，研究结果表明，一个生动的人口历史，其特点是进化最近的人口扩张和没有最近的瓶颈。在孟加拉国、缅甸和夏威夷观察到由于地理因素、生境分散和/或水果贸易限制造成的遗传隔离情况。关于入侵的模式，所考虑的人群的整体遗传特征表明，从中国到西方的西向迁移路线。
The phytophagous insects of the Tephritidae family offer different case histories of successful invasions. An example is Bactrocera dorsalis sensu stricto, the oriental fruit fly which has been recognized as a key pest of Asia and the Pacific. It is known to have the potential to establish adventive populations in various tropical and subtropical areas. Despite the economic risk associated with a putative stable presence of this fly, the genetic aspects of its invasion process have remained relatively unexplored. Using microsatellite markers we have investigated the population structure and genetic variability in 14 geographical populations across the four areas of the actual species range: Far East Asia, South Asia, Southeast Asia and the Pacific Area. Results of clustering and admixture, associated with phylogenetic and migration analyses, were used to evaluate the changes in population genetic structure that this species underwent during its invasion process and establishment in the different areas. The colonization process of this fly is associated with a relatively stable population demographic structure, especially in an unfragmented habitat, rich in intensive cultivation such as in Southeast Asia. In this area, the results suggest a lively demographic history, characterized by evolutionary recent demographic expansions and no recent bottlenecks. Cases of genetic isolation attributable to geographical factors, fragmented habitats and/or fruit trade restrictions were observed in Bangladesh, Myanmar and Hawaii. Regarding the pattern of invasion, the overall genetic profile of the considered populations suggests a western orientated migration route from China to the West.