The Distribution and Host Shifts of Cotton-Melon Aphids in Northern China

文献类型： 外文期刊

第一作者： Jun-Yu Luo

作者： Jun-Yu Luo;Shuai Zhang;Li Wang;Li-Min Lv;Chun-Yi Wang;Chun-Hua Li;Xiang- Zhen Zhu;Zhi-Guo Zhou;Jin-Jie Cui

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2016 年 11 卷 3 期

页码：

收录情况： SCI

摘要： Aphis gossypii Glover (Hemiptera: Aphididae) is a serious pest of cotton in northern China. A microsatellite analysis was used to characterize the genetic structure of A. gossypii populations from different geographic, host plant, and seasonal populations in 2014. Among 906 individuals, 507 multilocus genotypes were identified, with genotypic richness values of 0.07-1.00 for the populations. We observed moderate levels of genetic differentiation among geographic populations (F-ST = 0.103; 95% confidence interval: 0.065-0.145) and host plant populations (F-ST = 0.237; 95% confidence interval: 0.187-0.296). A Mantel test of isolation by distance revealed no significant correlations between Slatkin's linearized F-ST and the natural logarithm of geographic distance. A Bayesian analysis of population genetic structures identified three clusters. An analysis of molecular variance revealed significant differences among the three clusters (F = 0.26596, P < 0.0001), among seasons (F = 0.04244, P = 0.00381), and among host populations (F = 0.12975, P = 0.0029). Thus, the A. gossypii populations in northern China exhibit considerable genotypic diversity. Additionally, our findings indicated that the 31 analyzed populations could be classified as one of three host biotypes (i.e., cotton, cucumber, and pomegranate biotypes). There were also clear seasonal effects on population genetic structure diversity among aphids collected from Anyang.

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