双生病毒是存在于植物中唯一一类具有孪生颗粒形态的单链DNA病毒,也是目前已知的最大的单链DNA病毒家族,该病毒在单子叶和双子叶植物中具有广泛的宿主。目前已报道双生病毒能够感染玉米、棉花、番茄、木薯、甜菜等重要农作物,对农业生产危害极大。传统抗病机理的研究主要基于对病毒基因功能的分析及宿主病毒互作机理的解析,但目前在育种中的应用还比较有限。 Twin viruses are the only single-stranded DNA viruses present in plants with twin granule morphology and are the largest known family of single-stranded DNA viruses that have a wide range of hosts in monocotyledonous and dicotyledonous plants. It has been reported that twins virus can infect corn, cotton, tomato, cassava, sugar beet and other important crops, which is very harmful to agricultural production. The study of traditional disease resistance mechanism is mainly based on the analysis of the function of the virus genes and the analysis of the host virus interaction mechanism, but the application in the breeding is still relatively limited.