马铃薯A病毒研究进展  

Research Progress on Potato Virus A

作　　者：张维[1,2] 胡新喜[1,2] 熊兴耀[1,2] 聂先舟 何长征[1,2] 

机构地区：[1]湖南农业大学园艺园林学院 [2]湖南马铃薯工程技术研究中心 [3]Potato Research Center,Agriculture and Agri-Food Canada,850 Lincoln Road P.O.Box20280 Fredericton,NB E3B4Z7Canada

出　　处：《中国马铃薯》2013年第2期100-105,共6页Chinese Potato Journal

基　　金：湖南省研究生科研创新项目基金(CX2011B307)

摘　　要：马铃薯A病毒（PotatovirusA，PVA）是马铃薯生产上危害较严重的病毒之一。PVA已知的寄主为茄科植物，在马铃薯上引起的症状与气候条件、马铃薯品种和PVA的株系有关。PVA基因组与其他PVY属已知序列的病毒核苷酸序列同源性在53％～58％之间，编码的11种蛋白在基因组复制、蛋白加工、蚜虫传毒、系统移动以及与寄主组分互作等方面具有各自的功能。马铃薯对PVA的抗性分为过敏抗性（HR）和极端抗性（ER）两类，植物对PVA的抗性机制主要分为显性基因介导的抗性、隐性基因介导的抗性、RNA介导的抗性。PVA的致病机理、PVA抗性基因挖掘和抗PVA转基因新策略将是今后的研究重点。Potato virus A （PVA） causes serious viral disease in potato production. The host range of PVA is restricted to Solanaceae, and symptoms caused by PVA on potato depend on climatic conditions, potato cultivar and PVA strain. Overall nucleotide sequence of PVA identity compared with other completely sequenced potyvirus genomes is between 53% and 58 %. The PVA genome is expressed as a single polyprotein that is subsequently cleaved to 11 mature proteins functioned in DNA replication, protein processing, aphid transmission, systemic movement and interaction with host component. Potato defense against viruses is mainly highly devided into hypersensitive response （HR） and extreme resistance （ER）, and the resistance is mediated by dominant gene, recessive gene or RNA. The pathogenic mechanism, resistance gene mining and new transgenic strategies against PVA would be the focus of the future research.

关 键 词：PVA 致病症状 基因组 抗性 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]