入侵我国的木尔坦棉花曲叶病毒及其为害

棉花曲叶病是世界棉花生产上最具毁灭性的病毒病害，已在巴基斯坦、印度、苏丹、埃及和南非等国棉花产区广泛流行，造成巨大经济损失。目前，已克隆了与该病害相关的植物病毒8种，木尔坦棉花曲叶病毒（CLCuMV）即是其中之一，这些病毒均属双生病毒科菜豆金色花叶病毒属。CLCuMV是引起巴基斯坦、印度棉花曲叶病大流行的主要病原之一。该病毒由烟粉虱以持久方式传播，也可以嫁接传播，但不能通过机械摩擦接种传播和种子带毒传播；其基因组仅含有DNA-A组分，并伴随卫星β分子。自2006年首次在我国广东朱槿上检测与鉴定到该病毒以来，目前已在我国广东、广西和海南等多个地理区域发现该病毒引起的病害，受侵染寄主植物包括朱槿、黄秋葵、棉花和垂花悬铃花；同时，已入侵我国的CLCuMV及其卫星β分子的各地理区域和不同寄主来源的分离物DNA序列相似性均大于99％，遗传较稳定。基于文献报道及作者近年的研究，本文对棉花曲叶病的分布、病原、CLCuMV特性、已入侵我国的CLCuMV现状进行了较全面的综述，同时对入侵我国的CLCuMV来源及其威胁我国棉花生产的风险进行了讨论。CLCuMV＂对我国棉花等作物的威胁日益加剧，本研究可为该病毒的防控提供参考。

Cotton leaf curl Multan virus invading China and its damage potential

Cotton leaf curl disease is the most devastating virus diseases to cotton production in the world. The disease has been sprea- ding widely in cotton-growing areas in Pakistan, India, Sudan, Egypt and South Africa, and caused enormous economic losses. Up to now, eight species virus including Cotton leaf curl gultan virus （CLCuMV） have been cloned from the cotton diseased samples, all of which belongs to the genus Begomovirus of the family Geminiviridae. CLCuMV is transmitted in a persistent manner by the sweet potato whitefly （Bemisia tabaci）, and transmitted by grafting, but not transmitted by mechanical inoculation and seeds. CLCuMV is one of the main pathogens causing cotton leaf curl disease spread widely in Pakistan and India. The genome of the virus has only component A （DNA-A） and associated satellite beta molecular （DNA β）. Since CLCuMV was first detected and identified with molecular tech- niques on Hibiscus rosa-sinensis in Guangdong, China, in 2006, the plants with disease symptoms, infected by the virus were found in many areas of Guangdong, Guangxi and Hainan Provinces. The infected host plants include Hibiscus rosa-sinensis, Abelmoschus escu- lentus, Gossypium hirsutum and Malvaviscus arboreus. Both DNA-A and DNA β sequence identities of the isolates from different geo- graphic areas and different host plants in China were more than 99%. It means that the population DNA of CLCuMV invading China is stable. Based on the literatures and our study advances, the world distribution and pathogen of cotton leaf curl disease is summarised, the characteristics of CLCuMV and the present situation after invading China presented, meanwhile, the source of CLCuMV invading China and the risk of CLCuMV threatening the cotton production in China was discussed in this paper. The threat of CLCuMV on cot- ton and other crops is aggravating in China. The study will provide the basis for the prevention and control of CLCuMV.