The clock gene,period,influences migratory flight and reproduction of the oriental armyworm,Mythimna separata(Walker)  

作　　者：Jiayue Ji Yueqiu Liu Lei Zhang Yunxia Cheng David Stanley Xingfu Jiang 

机构地区：[1]State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing,China [2]School of Landscape Architecture,Bejing University of Agriculture,Bejing,China [3]Biological Control of Insects Research Laboratory,USDA/Agricultural Research Service,Columbia,MO,USA

出　　处：《Insect Science》2023年第3期650-660,共11页昆虫科学（英文版）

基　　金：the National Natural Science Foundation of China(No.32072420,31871951,31672019);China Agriculture Research System of MOF and MARA(CARS-22);the National Key Research and Development Program of China(2017YFD0201802,2017YFD0201701).

摘　　要：The oriental armyworm,Mythimna separata,is a major long-distance migratory insect pest of grain crops in China and other Asian countries.Migratory flights and reproductive behavior usually occur at night,regulated by a circadian rhythm.However,knowledge about the linkages between adult flight,reproduction,and clock genes is still incomplete.To fill this important gap in our knowledge,a clock gene(designated Msper)was identified and phylogenetic analysis indicated that the encoded protein(MsPER)was highly similar to PER proteins from other insect species.Quantitative RT-PCR assays demonstrated that significantly different spatiotemporal and circadian rhythmic accumulations of mRNA encoding MsPER occurred during development under steady 14 h:10 h light:dark conditions.The highest mRNA accumulation occurred in adult antennae and the lowest in larvae.Msper was expressed rhythmically in adult antennae,relatively less in photophase and more entering scotophase.Injecting small interference RNA(siRNA)into adult heads effectively knocked down Msper mRNA levels within 72 h.Most siRNA-injected adults reduced their evening flight activity significantly and did not exhibit a normal evening peak of flight activity.They also failed to mate and lay eggs within 72 h.Adult mating behavior was restored to control levels by 72 h post injection.We infer that Msper is a prominent clock gene that acts in regulating adult migratory flight and mating behaviors of M.separata.Because of its influence on migration and mating,Msper may be a valuable gene to target for effective management of this migratory insect.

关 键 词：flight action Mythimna separata period clock gene REPRODUCTION RNA interference 

分 类 号：S433[农业科学—农业昆虫与害虫防治]