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ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » National Germplasm Resources Laboratory » Research » Publications at this Location » Publication #322664

Research Project: CHARACTERIZING, DETECTING, AND ELIMINATING PATHOGENS TO ENABLE THE SAFE INTRODUCTION OF PLANT GENETIC RESOURCES

Location: National Germplasm Resources Laboratory

Title: Complete genome sequence of a divergent strain of Japanese yam mosaic virus from China

Author
item LAN, PINGXIU - Yunnan Agricultural University
item LI, FAN - Yunnan Agricultural University
item WANG, MINGQIANG - South China Agricultural University
item Li, Ruhui

Submitted to: Archives of Virology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/8/2014
Publication Date: 9/9/2014
Citation: Lan, P., Li, F., Wang, M., Li, R. 2014. Complete genome sequence of a divergent strain of Japanese yam mosaic virus from China. Archives of Virology. 160:573-576.

Interpretive Summary: Yams (Dioscorea spp.) are a group of multi-species tuber crops in many tropical and sub-tropical countries. Some yams are important medical plants. The crops were propagated by tubers, and their production is strongly limited by virus accumulation. In this study, the complete genomic sequence of a noval strain of a yam virus was determined. Analyses of the genomic information confirmed that it was distinct and evolved by recombination. The study provides the information necessary for evolution study of the virus. The information is also used to develop a better detection and diagnostic method for the virus.

Technical Abstract: A novel strain of Japanese yam mosaic virus (JYMV-CN) was identified in a yam plant with foliar mottle symptoms in China. The complete genomic sequence of JYMV-CN was determined. Its genomic sequence of 9701 nucleotides encodes a polyprotein of 3247 amino acids. Its organization was virtually identical to that of two JYMV isolates from Japan. With the latter it shared nucleotide sequence identities of only 74.7-74.8%, indicating it might be a new species. However, sequence analyses of the polyprotein and individual proteins suggested that the Chinese isolate is a divergent JYMV strain in the process of speciation.