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Complete genomic sequence analysis of a highly virulent isolate revealed a novel strain of Sugarcane mosaic virus

文献类型： 外文期刊

作者： Gao, Bo 1 ; Cui, Xiao-Wen 1 ; Li, Xiang-Dong 1 ; Zhang, Chun-Qing 2 ; Miao, Hong-Qin 3 ;

作者机构： 1.Shandong Agr Univ, Coll Plant Protect, Shandong Key Lab Agr Microbiol, Tai An 271018, Shandong, Peoples R China

2.Shandong Agr Univ, Coll Agron, Tai An 271018, Shandong, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Baoding 071000, Hebei, Peoples R China

关键词： Complete genomic sequence;Phylogenetic analysis;Strain typing;Sugarcane mosaic virus;Virulence

期刊名称：VIRUS GENES （ 影响因子：2.332； 五年影响因子：2.0 ）

ISSN： 0920-8569

年卷期： 2011 年 43 卷 3 期

页码：

收录情况： SCI

摘要： Sugarcane mosaic virus (SCMV) is the most prevalent virus causing maize dwarf mosaic disease in northern China. A SCMV isolate, BD8, was obtained from the maize showing dwarf and mosaic symptoms in Baoding, China. The complete genomic sequence of BD8 is 9,576 nucleotides (nt) excluding the poly(A) tail. It contains one single open reading frame of 9,192 nt and encodes a large polyprotein of 3,063 amino acids (aa), flanked by a 5'-untranslated region (UTR) of 148 nt and a 3'-UTR of 236 nt. The entire genomic sequence of BD8 shares identities of 79.1-80.8% with those of other 13 SCMV isolates available in the GenBank at nt level, while their CP genes share identities of 76.9-82.6 and 82.8-86.9% at nt and aa levels, respectively. Phylogenetic analysis of the complete genomic sequences reveals that SCMV can be clustered to four groups: group I includes isolates from maize, group II consists of isolates from sugarcane or maize, groups III and IV contain single isolate of AU-A (AJ278405) and BD8, respectively. Thus, BD8 represents a new strain of SCMV. Furthermore analysis of the CP gene sequences of more isolates shows that BD8 is clustered to a group with the isolates from Thailand and Vietnam, which implies that isolates of this strain have been distributed in South Asia. In the greenhouse, BD8 can cause severe symptoms in all the 12 maize varieties tested with high incidence, indicating that BD8 is highly virulent.

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