Population structure and introduction history of the pink bollworm, Pectinophora gossypiella, in China

文献类型： 外文期刊

第一作者： Wu, Kong-Ming

作者： Wu, Kong-Ming;Guo, Yu-Yuan

作者机构：

关键词： population structure;genetic structure;allelic frequency;allelic richness;introduction history;heterozygotes

期刊名称：ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA （ 影响因子：2.25； 五年影响因子：2.184 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae), a cotton pest probably native to Indo-Pakistan, invaded China at the beginning of the 20th century. Chinese P. gossypiella have been assumed to be the result of indiscriminate introductions from Pakistan and America by transport of cotton seed. We tested this long-held hypothesis and genotyped a total of 527 individuals from 14 sites at 13 microsatellite loci. We analyzed these data with traditional statistics as well as with Bayesian methods. The loci were, for the most part, highly polymorphic. The allelic richness of Chinese populations at six loci was greater than those of the Pakistani and American populations. Significant deficits of heterozygotes were recorded for all 14 populations, and null alleles were the most probable factor contributing to these deficits. Pairwise F-ST estimates showed that there was significant differentiation among the pooled Chinese, Pakistani, and American populations, and there was structure within most of the Chinese populations. The Bayesian analysis revealed that the combined Chinese, American, and Pakistani populations formed separate clusters, and the nine Chinese populations were divided into two clusters. Allelic frequency distributions showed that private and shared alleles within Chinese P. gossypiella were derived only partly from the Pakistani and American populations. The microsatellite-based genetic analyses suggested that the Chinese P. gossypiella populations originated from multiple sources.

分类号： Q96

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