双生病毒是世界范围内广泛发生的一类植物单链DNA病毒,已在多种作物上引起严重危害。重组是导致双生病毒变异和病害流行的重要原因。近年来,在单组份双生病毒中发现有新型卫星DNA分子——DNAβ,DNAβ是病毒致病所必需的。本文就双生病毒的危害性、病毒的重组、DNAβ的发现及与致病性的关系、双生病毒与伴随的小分子DNA形成病害复合体、双生病毒DNA-A和小分子DNA的进化关系等问题进行了简要评述。 Gemini virus is a family of plant single-stranded DNA viruses that are widespread worldwide and have caused serious harm on many crops. Recombination is a leading cause of geminiviruses and epidemics. In recent years, a single satellite DNA molecule, DNAβ, has been found in one-component gemini virus, which is required for virus pathogenesis. In this paper, the harmful effects of twin viruses, the recombination of viruses, the discovery of DNAβ and the relationship with pathogenicity, the evolutionary relationship between parvovirus DNA and small molecule DNA, A brief comment was made.