Genetic relationships of introduced Colorado potato beetle Leptinotarsa decemlineata populations in Xinjiang, China

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 und...

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Bibliographic Details
Published in:Insect science 2013-10, Vol.20 (5), p.643-654
Main Authors: Zhang, Jing-Jie, Yang, Juan, Li, Ying-Chao, Liu, Ning, Zhang, Run-Zhi
Format: Article
Language:English
Subjects:
Animals
China
Coleoptera - genetics
Colorado potato beetle
Demography
Gene Flow
Genetic Variation
Introduced Species
invasive pest
Leptinotarsa decemlineata
Phylogeny
Solanaceae
Solanum tuberosum
Xinjiang
中国
外来入侵物种
新疆维吾尔自治区
种群
科罗拉多
遗传关系
遗传多样性
马铃薯甲虫
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Summary: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.
ISSN:1672-9609
1744-7917
DOI:10.1111/j.1744-7917.2012.01565.x