加利福尼亚存在葡萄扇叶病毒 3 的一个分化变体。
A divergent variant of Grapevine leafroll-associated virus 3 is present in California.
机构信息
Department of Ecology, Evolution and Natural Resources, School of Environmental and Biological Sciences, Rutgers the State University of New Jersey, 14 College Farm Rd, New Brunswick, NJ 08901, USA.
出版信息
Virol J. 2012 Oct 13;9:235. doi: 10.1186/1743-422X-9-235.
BACKGROUND
Grapevine leafroll-associated viruses are a problem for grape production globally. Symptoms are caused by a number of distinct viral species. During a survey of Napa Valley vineyards (California, USA), we found evidence of a new variant of Grapevine leafroll-associated virus 3 (GLRaV-3). We isolated its genome from a symptomatic greenhouse-raised plant and fully sequenced it.
FINDINGS
In a maximum likelihood analysis of representative GLRaV-3 gene sequences, the isolate grouped most closely with a recently sequenced variant from South Africa and a partial sequence from New Zealand. These highly divergent GLRaV-3 variants have predicted proteins that are more than 10% divergent from other GLRaV-3 variants, and appear to be missing an open reading frame for the p6 protein.
CONCLUSIONS
This divergent GLRaV-3 phylogroup is already present in grape-growing regions worldwide and is capable of causing symptoms of leafroll disease without the p6 protein.
背景
葡萄卷叶伴随病毒是全球葡萄生产的一个问题。症状是由多种不同的病毒物种引起的。在对纳帕谷葡萄园（美国加利福尼亚州）的调查中，我们发现了葡萄卷叶伴随病毒 3（GLRaV-3）的一个新变体的证据。我们从一个有症状的温室种植植物中分离出它的基因组并对其进行了完全测序。
发现
在对代表性 GLRaV-3 基因序列的最大似然分析中，该分离株与最近从南非测序的变体和新西兰的部分序列最接近。这些高度分化的 GLRaV-3 变体的预测蛋白与其他 GLRaV-3 变体的差异超过 10%，并且似乎缺少 p6 蛋白的开放阅读框。
结论
这种分化的 GLRaV-3 进化枝已经存在于世界各地的葡萄种植区，并且能够在没有 p6 蛋白的情况下引起卷叶病的症状。
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