Key Lab of Integrated Crop Pest Management of Shandong Province, College of Agronomy and Plant Protection, Qingdao Agricultural University, Qingdao, 266109, P. R. China.
Department of Entomology, South China Agricultural University, Key Laboratory of Bio-Pesticide Innovation and Application of Guangdong Province, Guangzhou, 510642, P. R. China.
Sci Rep. 2017 May 22;7(1):2228. doi: 10.1038/s41598-017-02433-5.
Invasive genotypes may be associated with their ability to access the invasion habitat. The whitefly, Bemisia tabaci Q, has been an important agricultural pest in China since 2008. In order to identify the invasion routes and to provide insight into its invasion success in China, we analyzed the composition, distribution, and genetic diversity of mitochondrial haplotypes of B. tabaci Q. Samples were obtained from 23 provincial level administrative units in 2011, and analyses conducted based on the mtCOI. Our results revealed five haplotypes (abbreviated as Q1H1-Q1H5) were present in the Q1 subclade based on 773-bp mtCOI fragment analysis. The diversity of haplotypes indicated the B. tabaci Q populations were derived from multiple invasion sources originating from the western Mediterranean region. Among the haplotypes, Q1H1 was dominant, followed by Q1H2. The whitefly populations were generally characterized by low levels of genetic diversity based on the 773-bp mtCOI fragment. Similar results were obtained when the 657-bp fragment was analyzed using the procedure in a previous report. Potential mechanisms contributing to the dominance of the Q1H1 in China are also discussed. These results will be helpful in revealing the mechanisms that enabled the successful invasion of B. tabaci Q into the country.
入侵基因型可能与其进入入侵栖息地的能力有关。自 2008 年以来，烟粉虱 B. tabaci Q 一直是中国重要的农业害虫。为了确定入侵途径，并深入了解其在中国的入侵成功，我们分析了 B. tabaci Q 的线粒体单倍型的组成、分布和遗传多样性。我们于 2011 年从 23 个省级行政区采集了样本，并基于 mtCOI 进行了分析。我们的结果表明，在 Q1 亚群中存在 5 种单倍型（缩写为 Q1H1-Q1H5），基于 773-bp mtCOI 片段分析。单倍型的多样性表明 B. tabaci Q 种群来自起源于西地中海地区的多个入侵源。在这些单倍型中，Q1H1 占优势，其次是 Q1H2。根据 773-bp mtCOI 片段，粉虱种群的遗传多样性普遍较低。当使用先前报告中的程序分析 657-bp 片段时，得到了相似的结果。还讨论了导致 Q1H1 在我国占优势的潜在机制。这些结果将有助于揭示使 B. tabaci Q 成功入侵该国的机制。
