Complete sequence analysis reveals two distinct poleroviruses infecting cucurbits in China
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The complete RNA genomes of a Chinese isolate of cucurbit aphid-borne yellows virus (CABYV-CHN) and a new polerovirus tentatively referred to as melon aphid-borne yellows virus (MABYV) were determined. The entire genome of CABYV-CHN shared 89.0% nucleotide sequence identity with the French CABYV isolate. In contrast, nucleotide sequence identities between MABYV and CABYV and other poleroviruses were in the range of 50.7–74.2%, with amino acid sequence identities ranging from 24.8 to 82.9% for individual gene products. We propose that CABYV-CHN is a strain of CABYV and that MABYV is a member of a tentative distinct species within the genus Polerovirus.
KeywordsNucleotide Sequence Identity Chinese Isolate Bitter Melon Amino Acid Sequence Level Beet Western Yellow Virus
We would like to thank Professor Andrew O. Jackson for helpful comments on the manuscript. This work was supported by the National Key Basic Research Program of China (2006CB101903), the Natural Science Foundation of Beijing (6082006) and the Science and Technology Nova Program of Beijing (2007-B-032).
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