Journal of Insect Science (2015) 15 (150), 1-8

Wei Sun, Hui Dong, Yue-Bo Gao, Qian-Fu Su, Hai-Tao Qian, Hong-Yan Bai, Zhu-Ting Zhang and Bin Cong (2015)
Genetic variation and geographic differentiation among populations of the nonmigratory agricultural pest Oedaleus infernalis (Orthoptera: Acridoidea) in China
Journal of Insect Science 15 (150), 1-8
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, H_s: 0.2130) and cytochrome oxidase analyses (H_d: 0.653). There was no obvious geographical structure based on an unweighted pair group method analysis and median-joining network. The values of F_ST, theta^II, and Gst estimated in this study are low, and the gene flow is high (N_m > 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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Research topic(s) for pests/diseases/weeds:
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Oedaleus infernalis		China (NE)