Ultrabithorax is a key regulator for the dimorphism of wings,a main cause for the outbreak of planthoppers in rice  

作　　者：Fangzhou Liu Xiang Li Muhua Zhao Mengjian Guo Kehong Han Xinxin Dong Jing Zhao Wanlun Cai Qifa Zhang Hongxia Hua 

机构地区：[1]Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory,College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China [2]National Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University,Wuhan 430070,China [3]Shuangshui Shuanglu Institute,Huazhong Agricultural University,Wuhan 430070,China

出　　处：《National Science Review》2020年第7期1181-1189,共9页国家科学评论（英文版）

基　　金：the National Natural Science Foundation of China(31871953);the National Key Research and Development Program(2017YFD0301400);the Fundamental Research Funds for the Central Universities(2662015PY115);the Earmarked Fund for the China Agriculture Research System(CARS-01–05)。

摘　　要：Rice planthoppers,the most devastating rice pests,occur in two wing forms:the short-wing form for rapid population growth and long-wing form for long-distance migration,which together create the mechanism for outbreak.Here we show that Ultrabithorax(Ubx)is a key regulator for switching between the long-and short-wing forms of rice planthoppers.Ubx is expressed in both forewing and hindwing pads,which is different from the canonical model of Ubx expression.In brown planthoppers,expression of Ubx(Nl Ubx)is regulated by nutritional status of the rice host.High-quality young plants induce Nl Ubx expression leading to the short-wing form;low-quality ripe plants reduce Nl Ubx expression resulting in long-wing form.We also showed that Nl Ubx is regulated by the insulin receptors Nl In R1 and Nl In R2.The default expression of Nl In R1 inhibits Nl Ubx resulting in long-wings,while high-quality hosts induce Nl In R2 expression,which represses Nl In R1 thus promoting Nl Ubx expression to produce short-wings.

关 键 词：HOX ULTRABITHORAX rice planthopper wing polymorphism 

分 类 号：S435.112.3[农业科学—农业昆虫与害虫防治]