Genome organization of Papaya Ringspot Virus isolates from India: Complete genome organization and nucleotide sequence of PRSV pathotypes P and W

Parameswari, B., Jain, R.K.

ISBN 10: 3659178314 / ISBN 13: 9783659178313

Published by LAP LAMBERT Academic Publishing, 2012

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Bibliographic Details

• Title: Genome organization of Papaya Ringspot Virus isolates from India: Complete genome organization and nucleotide sequence of PRSV pathotypes P and W
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2012
• Language: English
• ISBN 10: 3659178314
• ISBN 13: 9783659178313
• Binding: Paperback
• Condition: Like New
• Book Type: book

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Synopsis

Genome of PRSV pathotypes P (10317 nt) and W (10335 nt) from India were completely sequenced. Their genome architecture was similar to other 15 isloates from the rest of the world. Comparative sequence analysis revealed that pathotypes P and W shared high degree of sequence identity both at nucleotide (89%) and aminoacid (94%) levels. Sequence comparison of individual cistrons (except P1) also revealed similar trend. The P1 region was most divergent (upto 33%) and this could be attributed to geographical and host adaptation of PRSV. Cistron by cistron sequence comparison of PRSV pathotypes P and W from India with available 15 sequences and phylogenetic analysis based on full genome polyprotein revealed two distinct groupings of Asian and American isolates, although PRSV India clustered along with the American isolates. Putative recombination sites (24) were available through out the genomes, except in small 6K2 region. Maximum numbers of recombination sites were seen in 5′UTR and P1 region and has been speculated to be the most vulnerable region in shaping PRSV genome.

About the Author

Dr. B. Parameswari, is presently working as Scientist (Plant Pathology) at Sugarcane Breeding Institute Regional Centre, Karnal. She completed her Ph.D from IARI, New Delhi. She is recipient of ICAR Jawaharlal Nehru award. Her research interests are in the areas of genomics, post transcriptional gene silencing and diagnosis of plant viruses.