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Sequence diversity studies of papaya ringspot virus isolates in South India reveal higher variability and recombination in the 5′-terminal gene sequences

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Title Sequence diversity studies of papaya ringspot virus isolates in South India reveal higher variability and recombination in the 5′-terminal gene sequences
Not Available
 
Creator Ritesh Mishra
Sharana Patil
Ayyanagouda Patil
Basavaprabhu L. Patil*
 
Subject Papaya ringspot virus isolates
 
Description Not Available
Papaya ringspot virus (PRSV) is one of the most devastating viruses which causes huge damage to papaya plantations across the globe. PRSV is a positive sense RNA virus encoding for a polyprotein that is processed into ten proteins. In this study for the first time we analyzed the variability for 15 PRSV isolates from a selected geographical region of a South Indian state Karnataka, which is under intensive papaya cultivation. Variability studies were done for two genes at the 5′ end of the viral genome, namely P1 and helper component proteinase (Hc-Pro) and towards the 3′ end, a 788 nt overlapping region of nuclear inclusion B (NIb, 692 nt) and of capsid protein (CP, 96 nt), referred as NIb-CP. Our studies indicate that the P1 is most variable region with a wider range of sequence identity, followed by Hc-Pro, while the 788 nt of NIb-CP was most conserved. P1 also showed maximum recombination events followed by Hc-Pro, whereas NIb-CP did not show any recombination. Further, the pattern and number of phylogenetic clusters was variable for each of the three genomic regions of PRSV isolates. Estimation of selection pressure for all the three PRSV genomic regions indicated negative and purifying selection.
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Date 2019-03-19T03:30:51Z
2019-03-19T03:30:51Z
2019-02-01
 
Type Research Paper
 
Identifier R. Mishra, S. Patil, A. Patil and B. L. Patil* (2019) Sequence diversity studies of papaya ringspot virus isolates in South India reveal higher variability and recombination in the 5′-terminal gene sequences. Virus Disease. https://doi.org/10.1007/s13337-019-00512-x
https://doi.org/10.1007/s13337-019-00512-x
http://krishi.icar.gov.in/jspui/handle/123456789/17390
 
Language English
 
Relation Not Available;
 
Publisher Virus Disease. https://doi.org/10.1007/s13337-019-00512-x