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Genetic structure of populations of sugarcane streak mosaic virus in China: Comparison with the populations in India

文献类型： 外文期刊

作者： He, Zhen 2 ; Yasaka, Ryosuke 3 ; Li, Wenfeng 5 ; Li, Shifang 1 ; Ohshima, Kazusato 3 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

2.Yangzhou Univ, Sch Hort & Plant Protect, Dept Plant Pathol, Yangzhou 225009, Jiangsu, Peoples R China

3.Saga Univ, Dept Appl Biol Sci, Lab Plant Virol, Fac Agr, Honjo, Saga 8408502, Japan

4.Kagoshima Univ, United Grad Sch Agr Sci, Kagoshima 8900065, Japan

5.Yunnan Acad Agr Sci, Sugarcane Res Inst, Yunnan Key Lab Genet Improvement Sugarcane, Kaiyuan 661600, Yunnan Province, Peoples R China

关键词： Sugarcane streak mosaic virus;Poacevirus;Mixed infection;Population structure;Gene flow

期刊名称：VIRUS RESEARCH （ 影响因子：3.303； 五年影响因子：3.445 ）

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收录情况： SCI

摘要： Sugarcane streak mosaic virus (SCSMV) causes mosaic and streak symptoms on sugarcane and sorghum crops, and has a broad host range. SCSMV is a member of the genus Poacevirus in the family Potyviridae.Ten SCSMV isolates were collected from sugarcane plants showing mosaic and streaking in Southern China from 2009-2011. Sequence-based phylogenetic and population genetic analyses were conducted using four partial genomic sequences covering the full genomes. These analyses were used to estimate the sub-population differentiation and divergence within the Chinese virus population, and were compared with isolates from India. SCSMV-infected sugarcane plants in the field commonly harbor virus quasispecies (mutant cloud), and often have mixed infections with the same virus isolates. Inter- and intra-lineage recombination sites were identified in the protein 1, helper-component proteinase, coat protein and 3' non-coding regions of the Chinese isolates. All the Chinese non-recombinant isolates fell into at least nine lineages, and many clustered with Indian isolates. However, estimates of genetic differentiation and gene flow indicated that the SCSMV populations in China and India are genetically independent. Our genetic study of a poacevirus population in South Asia regions indicates the importance of the evolutionary-based design to control viruses. (C) 2015 Elsevier B.V. All rights reserved.

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