Population genetics of Ceratitis capitata in South Africa: implications for dispersal and pest management.
Population genetics of Ceratitis capitata in South Africa: implications for dispersal and pest management.
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DOI：
10.1371/journal.pone.0054281
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Terblanche JS
中科院分区：
文献类型：
--
作者：
Karsten M;van Vuuren BJ;Barnaud A;Terblanche JS
地中海实蝇（Ceratitis capitata）是一种重要的农业和经济害虫。了解入侵风险和减轻地中海实蝇在农业景观需要了解其人口结构和扩散模式。在这里，传播能力的估计提供在南非的地中海果蝇在三个空间尺度上使用分子方法。个体在11个多态性微卫星位点进行基因分型，并对一部分个体进行线粒体细胞色素氧化酶亚基I基因测序。我们的研究结果表明，南非地中海果蝇种群的特点是高水平的遗传多样性和有限的种群分化在所有的空间尺度。这表明采样地点之间存在高水平的基因流动。然而，自然扩散在C。capitata已被证明很少超过10公里。因此，本研究中记录的高基因流水平，即使是在遥远的种群之间（>1600 km），也可能是人类介导的扩散或至少某种形式的长距离跳跃扩散的结果。这些发现可能对全球其他水果生产领域具有广泛的适用性，并对正在进行的害虫管理实践（如昆虫不育技术）具有重要意义。
The invasive Mediterranean fruit fly (medfly), Ceratitis capitata, is one of the major agricultural and economical pests globally. Understanding invasion risk and mitigation of medfly in agricultural landscapes requires knowledge of its population structure and dispersal patterns. Here, estimates of dispersal ability are provided in medfly from South Africa at three spatial scales using molecular approaches. Individuals were genotyped at 11 polymorphic microsatellite loci and a subset of individuals were also sequenced for the mitochondrial cytochrome oxidase subunit I gene. Our results show that South African medfly populations are generally characterized by high levels of genetic diversity and limited population differentiation at all spatial scales. This suggests high levels of gene flow among sampling locations. However, natural dispersal in C. capitata has been shown to rarely exceed 10 km. Therefore, documented levels of high gene flow in the present study, even between distant populations (>1600 km), are likely the result of human-mediated dispersal or at least some form of long-distance jump dispersal. These findings may have broad applicability to other global fruit production areas and have significant implications for ongoing pest management practices, such as the sterile insect technique.
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