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Barley yellow dwarf is a plant disease caused by the barley yellow dwarf virus, and is the most widely distributed viral disease of cereals. It affects the economically important crop species barley, oats, wheat, maize, triticale and rice. ==Biology== Barley yellow dwarf virus (BYDV) is a positive sense single-stranded RNA virus; the viron is not enveloped in a lipid coating.〔International Committee on the Taxonomy of Viruses. 2002. (Barley yellow dwarf virus ) 〕 The virus is transmitted by aphids, and the taxonomy of the virus is based on genome organisation, serotype differences 〔Ali, M, Tahir, M, Hameed, S, Ashraf, M 2013. Coat protein based molecular characterization of Barley yellow dwarf virus isolates identified on oats in Pakistan.''Acta Virologica'' 57(3):383-385 〕 and on the primary aphid vector of each isolate. The isolates and their major vectors (in parentheses) are:〔Miller, W.A. and Rasochova, L. 1997. Barley yellow dwarf viruses. ''Annual Review of Phytopathology'' 35:167-190 〕 *Subgroup I * *MAV, a less severe strain carried by aphids (Grain aphid, ''Sitobion avenae''), SGV (''Schizaphis graminum''), and PAV, a less severe strain carried by aphids (bird cherry-oat aphid, ''Rhopalosiphum padi'', grain aphid, ''S. avenae'', and others including rose-grain aphid, ''Metopolophium dirhodum''). *Subgroup II, called Cereal Yellow Dwarf Virus, however CYDV is now recognised as a separate species belonging to the ''Polerovirus'' genus of the Luteoviridae family * *RPV, the most severe strain carried by aphids (Bird cherry-oat aphid, ''Rhopalosiphum padi''), RMV (''Rhopalosiphum maidis'') 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「barley yellow dwarf」の詳細全文を読む スポンサード リンク
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