Genetic relationships of introduced Colorado potato beetle Leptinotarsa decemlineata populations in Xinjiang, China
Genetic relationships of introduced Colorado potato beetle Leptinotarsa decemlineata populations in Xinjiang, China
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DOI：
10.1111/j.1744-7917.2012.01565.x
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发表时间：
2013-10
期刊：
影响因子：
4
通讯作者：
Jingjin Zhang;Juan-Sheng Yang;Yingchao Li;Ningwu Liu;Run-zhi Zhang
中科院分区：
文献类型：
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作者：
Jingjin Zhang;Juan-Sheng Yang;Yingchao Li;Ningwu Liu;Run-zhi Zhang
科罗拉多州马铃薯甲虫(Leptinotarsa decemlineata，简称Leptinotarsa decemlineata)是一种臭名昭著的入侵物种，它侵袭马铃薯和其他茄科作物。CPB最早于1993年在中国发现，现已蔓延至新疆维吾尔自治区2.77万平方公里。为了更好地了解遗传变异和迁移模式，我们利用7个多态微卫星座位对新疆10个CPB群体的遗传关系和基因流动进行了研究。(I)总体上新疆种群的遗传多样性水平较低，但在入侵过程中种群间保留了大部分的遗传多样性。(2)群体间平均配对FST较低(0.071±0.043)。乌苏、乌鲁木齐、吉木萨尔、奇台、木雷5个腹地种群与塔城种群间的遗传分化较小(Fst为0.038±0.016)。通过贝叶斯聚类，这6个群体可能来自同一个遗传群体，并且在邻接树上关系密切。结合历史资料，这五个内陆种群可能起源于塔城。(3)基因流动频繁，尤其是在五个内部群体之间。新疆境内甲虫种群可归为塔城甲虫的概率(平均值为0.518±0.127)高于塔城种群归为塔城甲虫的概率(平均值为0.328±0.074)，表明新疆甲虫种群已由边疆向内地扩散。
The Colorado potato beetle (CPB), Leptinotarsa decemlineata (Say), is an infamous invasive species worldwide that aggressively attacks potato and other Solanaceae crops. CPB was first found in China in 1993 and has since spread across 2.77 × 105 km2 in Xinjiang Uygur Autonomous Region. To better understand genetic variation and migration patterns, we used seven polymorphic microsatellite loci to elucidate the genetic relationships and gene flow among 10 CPB populations across Xinjiang. (i) Overall low levels of genetic diversity were detected on the entire population in Xinjiang but most of the diversity was retained among populations during invasion. (ii) The mean pairwise FST was low (0.071 ± 0.043) among populations. The genetic differentiation was little (pairwise FST 0.038 ± 0.016) between the five interior populations (Wusu, Urumqi, Jimsar, Qitai and Mulei) and Tacheng population. The six populations might come from the same genetic group via Bayesian clustering and were closely related on a neighbor‐joining tree. Combining the history data, the five interior populations may have originated from Tacheng. (iii) Gene flow was frequent, especially among the five interior populations. Individuals from the interior populations could be assigned to Tacheng at higher probabilities (means 0.518 ± 0.127) than vice versa (means 0.328 ± 0.074), suggesting that the beetle population has spread from the border to the interior in Xinjiang.