Department of Biology, Faculty of Science, Mahasarkham University, Kantharawichai District, Maha Sarakham, 44150 Thailand.
Genome. 2019 Nov;62(11):739-747. doi: 10.1139/gen-2019-0122. Epub 2019 Sep 6.
The solanum fruit fly, (Hendel), is an important pest species of commercial plants in the family Solanaceae. In this study, the population genetic structure of was investigated using mitochondrial cytochrome oxidase I sequences. A mitochondrial DNA haplotype network revealed no major genetic break, but haplotypes from recently invaded areas in Japan, Tanzania, and Kenya were genetically divergent. The overall haplotype network is approximately star-shaped, characteristic of recent demographic expansion of populations. This is also supported by large negative values of neutrality tests. Despite the overall pattern of recent population history, genetic structure analysis revealed considerable genetic structuring with 33% of pairwise comparisons being significantly different. Populations that were genetically different from the others usually possess low genetic diversity, suggesting that genetic drift is potentially a factor driving genetic differentiation. Local extinction and recolonization processes related to the availability of host plants are most likely responsible for a founder effect and subsequent genetic drift in a population.
茄二十八星瓢虫，（Hendel），是茄科商业植物的重要害虫。本研究采用线粒体细胞色素氧化酶 I 序列，对其种群遗传结构进行了调查。线粒体 DNA 单倍型网络显示没有明显的遗传断裂，但来自日本、坦桑尼亚和肯尼亚最近入侵地区的单倍型在遗传上存在差异。总的单倍型网络近似于星状，这是种群近期扩张的特征。中性检验的大量负值也支持了这一点。尽管整体种群历史模式如此，但遗传结构分析显示存在相当大的遗传结构，33%的成对比较存在显著差异。与其他种群遗传不同的种群通常具有较低的遗传多样性，这表明遗传漂变可能是驱动遗传分化的一个因素。与寄主植物的可利用性有关的局部灭绝和再殖民化过程很可能导致种群的奠基者效应和随后的遗传漂变。
