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Complete genome characterization and population dynamics of potato virus Y-NTN strain from India

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Title Complete genome characterization and population dynamics of potato virus Y-NTN strain from India
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Creator Aflaq Hamid
Ying Zhai
S. V. Ramesh
Hanu R Pappu
 
Subject Potato virus Y, PVY-NTN strain, Genome analysis, Recombination, Virus evolution
 
Description Not Available
Potato virus Y (PVY) is a major threat to potato
cultivation worldwide. PVY exists as biologically and
genetically distinct strains and causes varying degrees of
pathogenicity and a wide range of symptoms in potato.
Knowledge of the nature of PVY strains is essential for
breeding PVY resistant cultivars that are durable against a
wide range of strains. We report the complete genome of a
PVY potato isolate (JK12) characterised from the potato
production areas of Jammu and Kashmir, India. Nucleotide
sequence comparisons and phylogenetic analysis with
known PVY strains revealed that the isolate belongs to the
NTN strain of PVY. At the whole genome sequence level,
the JK12 isolate shared the highest identity (99.42%) with
PVY-NTN strains reported from Germany, followed by
those from United Kingdom (99.34%) and Japan (99.33%).
Recombination detection analysis identified two recombination
break points and JK12 appeared to have originated
from a recombination event between a PVY-N strain from
Belgium as a major parent and a PVY-O strain from China
as the minor parent. Our results suggest possible mutation
and recombination could be the basis for the evolution and the subsequent establishment of NTN in this region. Furthermore,
a global evolutionary lineage analysis of all the
known PVY strains showed relatively low nucleotide
diversity among the PVY-NTN strains. Neutrality tests
showed that all the genotypes of PVY are undergoing
purifying selection suggesting population expansion of
PVY. This is the first report of complete genomic characterization
of an NTN strain of PVY isolated from commercial
potato fields in India. The implications of the
emergence of this strain in the Indian context are discussed.
Not Available
 
Date 2021-07-30T04:55:59Z
2021-07-30T04:55:59Z
2019-04-05
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/51358
 
Language English
 
Relation Not Available;
 
Publisher Springer