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Title: A CHINESE ISOLATE OF BARLEY YELLOW DWARF VIRUS-PAV REPRESENTS A THIRD DISTINCT SPECIES WITHIN THE PAV SEROTYPE

Author
item LIU, FANG - HUNAN AGRIC. UNIV.
item WANG, XIFENG - ACADEMY OF AG. SCIENCES
item XIE, Y.L.J. - ACADEMY OF AG. SCIENCES
item GRAY, STEWART
item ZHOU, GUANGHE - ACADEMY OF AG. SCIENCES
item GAO, BIDA - HUNAN AGRIC. UNIV

Submitted to: Archives of Virology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/22/2007
Publication Date: 3/9/2007
Citation: Liu, F., Wang, X., Xie, Y., Gray, S.M., Zhou, G., Gao, B. 2007. A chinese isolate of barley yellow dwarf virus-pav represents a third distinct species within the pav serotype. Archives of Virology. 152:1365-1373

Interpretive Summary: The viruses that cause barley yellow dwarf disease in cereal crops are a group of genetically diverse species that share a common biology. BYD remains the most economically important virus disease of cereal crops worldwide, but effective resistance has not been achieved primarily due to the extreme genetic diversity of the viruses and their ability to overcome plant resistance genes which tend to be virus isolate specific. This manuscript describes yet another genetically distinct virus that is widespread in China and may have relatives in northern Europe. The molecular characterization of this virus allows it to be compared against other viruses causing BYD and to identify commonalities that can be exploited when developing plants that would have a broad spectrum resistance against many isolates of the virus.

Technical Abstract: The complete nucleotide sequence of Barley yellow dwarf virus PAV-CN genomic RNA was determined. This represents the seventh complete genome sequence of a BYDV-PAV serotype. The genome organization of PAV-CN was comparable to other BYDV-PAV serotypes, but the nucleotide sequence was only 76-84% similar. Sequence similarity of individual open reading frames and untranslated regions ranged from 38-98%. Overall, BYDV PAV-CN was most closely aligned with the BYDV-PAS species although the 5’ UTR and ORF1 was most similar to BYDV-GAV, another Luteovirus species serologically related to BYDV-MAV. These data suggest that PAV-CN may have undergone a recombination event with GAV and that PAV-CN represents a third distinct species within the PAV serotype of BYDV.