Molecular and biological characterization of soybean yellow mottle mosaic virus severe strain infecting soybean in India

Abstract

The complete nucleotide sequence and genome organization of soybean yellow mottle mosaic virus severe strain causing bright yellow mosaic, mottling and puckering symptoms in soybean (Glycine max) from India was determined. The monopartite single stranded genomic RNA is 3974 nuclotides long and has the potential to encode six viral proteins viz., p25, p83, p8, p10, p39 and p25. The SYMMV-Sb isolate differed from mungbean strain with 69 nucleotides and nine aminoacids dispersed over the various ORFs. Comparative sequence analysis revealed that SYMMV-Sb shared 98% nt sequence identity at complete genome level and 96-100% at all ORFs level with SYMMV mungbean strain from India and 71-92% identity with SYMMV Korean soybean isolate, whereas it showed very low sequence identity with other tombusviridae members (2-53%). The phylogenetic analysis showed the clustering of SYMMV-Sb along with other members of genus Gammacarmovirus. The SYMMV-Sb isolate produced chlorotic blotches, mild and veinal mottling, necrosis and puckering symptoms in various leguminous host plants. The symptomatalogy of the soybean isolate was differed from mungbean strain as earlier induced severe symptoms on soybean and mild symptoms on mungbean.

Incidence of viral disease mosaic symptom and vector insects’ presence in several soybean varieties in pine agroforestry system

“…Other viruses such as Cowpea Mild Mottle Virus (CpMMV) caused mild mosaic and mottle symptoms in soybeans [7,8]. Other viruses that could also cause these symptoms included Soybean Yellow Mosaic Virus (SYMV) [9] and Mungbean Yellow Mosaic Virus (MYMV) [10]. However, the existence of the virus in this study is still under confirmation.…”