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Five Potato leafroll virus (PLRV) isolates were collected from five states representing different potato growing parts of India. The ssRNA genome sequences of these isolates were determined. The genome comprised of 5,883 nucleotides and deduced genome organization resembled other PLRV isolates. About 97.6-98.7 % similarities was observed within the Indian isolates and were more close to European, Canadian, African, American and Czech isolates (95.8-98.6 %) than to an Australian isolate (92.9-93.4 %). These isolates were 43.7-53.1 % similar to other poleroviruses and 29.1-29.3 % to Barley yellow dwarf virus, a luteovirus. Out of five isolates, the isolate PBI-6 was recombinant one as detected by RDP3 software. Multiple sequence alignment of nucleotide and amino acid sequences of different ORFs indicated that the ORF 3 and ORF 4, corresponding to coat protein and movement proteins are more conserved than other ORFs. Amino acid changes specific to Indian isolates were observed and it was more in ORF 2 than in ORF 0, ORF 3 and ORF 4. This is the first report of complete genome sequence of PLRV isolates from India, which reveals low level genetic diversity.

indian journal of virology/indian journal of virology

Complete Genome Sequence of Potato leafroll virus Isolates Infecting Potato in the Different Geographical Areas of India Shows Low Level Genetic Diversity