Genetic relationships of introduced Colorado potato beetle Leptinotarsa decemlineata populations in Xinjiang,China |
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Authors: | Jing‐Jie Zhang Juan Yang Ying‐Chao Li Ning Liu Run‐Zhi Zhang |
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Affiliation: | 1. Key Laboratory of Zoological Systematics and Evolution, Institute of Zoology, Chinese Academy of Sciences;2. Graduate University of Chinese Academy of Sciences, , Beijing;3. College of Agriculture, Guangxi University, , Nanning;4. Beijing Forestry University;5. State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, , Beijing, China |
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Abstract: | 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. |
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Keywords: | China Colorado potato beetle genetic variation invasive pest Leptinotarsa decemlineata Xinjiang |
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