Genetic Variation and Geographic Differentiation Among Populations of the Nonmigratory Agricultural Pest Oedaleus infernalis (Orthoptera: Acridoidea) in China |
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Authors: | Wei Sun Hui Dong Yue-Bo Gao Qian-Fu Su Hai-Tao Qian Hong-Yan Bai Zhu-Ting Zhang Bin Cong |
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Affiliation: | 1.College of Plant Protection, Shenyang Agricultural University, Shenyang 110161, China;2.Key Laboratory of Integrated Pest Management on Crops in Northeast, Ministry of Agriculture, Institute of Plant Protection, Jilin Academy of Agricultural Sciences, Gongzhuling 136100, China;3.General Station of Forest Pest Management, State Forestry Administration, Shenyang 110034, China;4.School of Environment & Life Science, Kaili University, Kaili 556011, China |
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Abstract: | The nonmigratory grasshopper Oedaleus infernalis Saussure (Orthoptera : Acridoidea) is an agricultural pest to crops and forage grasses over a wide natural geographical distribution in China. The genetic diversity and genetic variation among 10 geographically separated populations of O. infernalis was assessed using polymerase chain reaction-based molecular markers, including the intersimple sequence repeat and mitochondrial cytochrome oxidase sequences. A high level of genetic diversity was detected among these populations from the intersimple sequence repeat (H: 0.2628, I: 0.4129, Hs: 0.2130) and cytochrome oxidase analyses (Hd: 0.653). There was no obvious geographical structure based on an unweighted pair group method analysis and median-joining network. The values of FST, θII, and Gst estimated in this study are low, and the gene flow is high (Nm > 4). Analysis of the molecular variance suggested that most of the genetic variation occurs within populations, whereas only a small variation takes place between populations. No significant correlation was found between the genetic distance and geographical distance. Overall, our results suggest that the geographical distance plays an unimpeded role in the gene flow among O. infernalis populations. |
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Keywords: | genetic diversity gene flow ISSR COI |
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