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Molecular Evidence for Association of Tobacco Curly Shoot Virus and a Betasatellite with Curly Shoot Disease of Common Bean (Phaseolus vulgaris L.) from India | Abstract
ISSN: 2157-7471

Journal of Plant Pathology & Microbiology
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Research Article

Molecular Evidence for Association of Tobacco Curly Shoot Virus and a Betasatellite with Curly Shoot Disease of Common Bean (Phaseolus vulgaris L.) from India

Venkataravanappa V1*, Swarnalatha P2, Lakshminarayana Reddy CN3*, Mahesh B1, Rai AB1 and Krishna Reddy M2

1Division of Crop Protection, Indian Institute of Vegetable Research, Varanasi-221305, Uttar Pradesh, India

2Indian Institute of Horticultural Research, Hessaraghatta Lake PO, Bangalore-560089, Karnataka, India

3Department of Plant Pathology, College of Sericulture, University of Agricultural Sciences (B), Chintamani-563125, Karnataka, India

*Corresponding Author:
Venkataravanappa V
Division of Crop Protection
Indian Institute Vegetable Research
Varanasi-221305, Uttar Pradesh, India
Fax: (05443)-229007
E-mail: [email protected]
 
Lakshminarayana Reddy CN
Department of Plant Pathology
College of Sericulture, University of Agricultural Sciences (B)
Chintamani-563125, Karnataka, India
E-mail: [email protected]

Received date: October 12, 2012; Accepted date: November 23, 2012; Published date: November 28, 2012

Citation: Venkataravanappa V, Swarnalatha P, Lakshminarayana Reddy CN, Mahesh B, Rai AB, et al. (2012) Molecular Evidence for Association of Tobacco Curly Shoot Virus and a Betasatellite with Curly Shoot Disease of Common Bean (Phaseolus vulgaris L.) from India. J Plant Pathol Microb 3:148. doi:10.4172/2157-7471.1000148

Copyright: © 2012 Venkataravanappa V, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

A new strain (FB01) of Tobacco curly shoot virus (TbCSV) showing curly shoot symptoms on common bean plants from Varanasi, Uttar Pradesh state of India was characterized. The analysis of the whole genome sequence and individual ORFs of this virus indicated that it is very closely related (sequence similarity of 89.1-94.5%) to the TbCSV infecting solanaceous and other weed crops in India and China. This was well supported by phylogenetic analysis with close clustering of the virus isolate with TbCSV. The absence of DNA-B and association of virus with betasatellite confirmed it as a monopartite begomovirus. The betasatellite identified here shared highest (53.9-93.9%) sequence identity with tomato leaf curl betasatellite. Further, putative recombination events were recognized within the virus sequence, suggesting that the virus is a recombinant and evolved from recombination of Tobacco
curly shoot virus, Munbean yellow mosaic virus, Tomato leaf curl Jodhpur virus, Tobacco leaf curl Yunnan virus and Ageratum enation virus like ancestors. For betasatellite, the putative recombination events were recognized within the sequence, were interspecific. The new recombinant betasatellite was derived from recombination between Croton yellow vein mosaic betasatellite and Tomato yellow leaf curl China betasatellite, as the foremost parents in its evolution. The virus was transmitted by whiteflies as well as sap, and not by seed.

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