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Molecular genetic analysis and evolution of begomoviruses and betasatellites causing yellow mosaic disease of bhendi

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Title Molecular genetic analysis and evolution of begomoviruses and betasatellites causing yellow mosaic disease of bhendi
Not Available
 
Creator RV Kumar, HC Prasanna, AK Singh, D Ragunathan, GK Garg, S Chakraborty.
 
Subject Geminiviridae, Begomovirus, Betasatellite, Microsatellite, Nucleotide diversity, Recombination
 
Description Not Available
In India, Bhendi yellow vein mosaic disease
(BYVMD) is one of the most economically important diseases
of bhendi/okra and is caused by a complex of
monopartite begomovirus (Bhendi yellow vein mosaic
virus—BYVMV) and betasatellite (Bhendi yellow vein
betasatellite—BYVB). In this study, we have analyzed the
role of possible evolutionary factors involved in the evolution
of BYVMV and BYVB isolates. Evidence of interspecies
and inter-strain recombination events was detected
among the viral isolates, and majority of these recombinant
isolates possess microsatellites in their genome. Recombination
analysis suggests that cotton-infecting and bhendiinfecting
begomoviruses probably share a recent common
ancestor. In addition to genetic differentiation and gene flow,
high degree of genetic variability was detected among the
viral population. A strong purifying selection seems to be
acting on the viral coding regions. The nucleotide substitution
rate of V1 gene (for BYVMV) and bC1 gene (for
BYVB) was estimated to be 7.55 9 10-4 and 2.25 9 10-3
nucleotide substitutions/site/year, respectively. The present
study underlines that the evolution of BYVMD-associated
viral components is driven by selection acting on the genetic
variation generated by recombination and mutation.
Not Available
 
Date 2019-09-06T05:37:38Z
2019-09-06T05:37:38Z
2016-11-01
 
Type Research Paper
 
Identifier 11
1572-994X
http://krishi.icar.gov.in/jspui/handle/123456789/22966
 
Language English
 
Relation Not Available;
 
Publisher Springer