Unexpected relationships of substructured populations in Chinese Locusta migratoria |
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| Authors: | De-Xing Zhang Lu-Na Yan Ya-Jie Ji Godfrey M Hewitt Zu-Shi Huang |
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| Affiliation: | (1) State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, PR China;(2) Center for Computational and Evolutionary Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, PR China;(3) School of Biological Sciences, University of East Anglia, Norwich, NR4 7TJ, UK;(4) College of Biological Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei, 050018, PR China |
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| Abstract: | Background Highly migratory species are usually expected to have minimal population substructure because strong gene flow has the effect of homogenizing genetic variation over geographical populations, counteracting random drift, selection and mutation. The migratory locust Locusta migratoria belongs to a monotypic genus, and is an infamous pest insect with exceptional migratory ability – with dispersal documented over a thousand kilometers. Its distributional area is greater than that of any other locust or grasshopper, occurring in practically all the temperate and tropical regions of the eastern hemisphere. Consequently, minimal population substructuring is expected. However, in marked contrast to its high dispersal ability, three geographical subspecies have been distinguished in China, with more than nine being biologically and morphologically identified in the world. Such subspecies status has been under considerable debate. |
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