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http://krishi.icar.gov.in/jspui/handle/123456789/1771| Title: | Molecular Characterization of Geographically Different Banana Bunchy Top Virus (BBTV)Isolates in India. |
| Authors: | Selvarajan R, M Mary Sheeba, V Balasubramanian, R Rajmohan, N Lakshmi Dhevi and T Sasireka. |
| Published/ Complete Date: | 2011-01-06 |
| Keywords: | Banana bunchy top virus, Babuvirus, Nanoviridae, South Pacific, PCR, Hill Banana |
| Publisher: | Springer Link |
| Citation: | 5 |
| Abstract/Description: | Banana bunchy top disease (BBTD) caused by Banana bunchy top virus (BBTV) is one of the most devastating diseases of banana and poses a serious threat for cultivars like Hill Banana (Syn: Virupakshi) and Grand Naine in India. In this study, we have cloned and sequenced the complete genome comprised of six DNA components of BBTV infecting Hill Banana grown in lower Pulney hills, Tamil Nadu State, India. The complete genome sequence of this hill banana isolate showed high degree of similarity with the corresponding sequences of BBTV isolates originating from Lucknow, Uttar Pradesh State, India, and from Fiji, Egypt, Pakistan, and Australia. In addition, sixteen coat protein (CP) and thirteen replicase genes (Rep) sequences of BBTV isolates collected from different banana growing states of India were cloned and sequenced. The replicase sequences of 13 isolates showed high degree of similarity with that of South Pacific group of BBTV isolates. However, the CP gene of BBTV isolates from Shervroy and Kodaikanal hills of Tamil Nadu showed higher amino acid sequence variability compared to other isolates. Another hill banana isolate from Meghalaya state had 23 nucleotide substitutions in the CP gene but the amino acid sequence was conserved. This is the first report of the characterization of a complete genome of BBTV occurring in the high altitudes of India. Our study revealed that the Indian BBTV isolates with distinct geographical origins belongs to the South Pacific group, except Shervroy and Kodaikanal hill isolates which neither belong to the South Pacific nor the Asian group. |
| Description: | India is the largest producer of banana in the world, with a total production of 23.20 million tonnes from an area of 0.64 million hectares [13]. Banana is affected by many bacterial, viral, and fungal pathogens and they cause a significant yield loss [7]. Banana bunchy top disease (BBTD) caused by Banana bunchy top virus (BBTV) is a very serious disease in India. Since the 1970s, BBTD has devastated large plantations of cv. Virupakshi (AAB), an elite cultivar also known as "Hill Banana" in lower Pulney hills, Tamil Nadu State, India. The area under cultivation of this banana cultivar has been reduced from 18,000 to 2,000 ha (Kesavamoorthy [10] due to BBTD). A recent survey made during May 2009, in Pulney hills, Dindigul district of Tamil Nadu recorded 14-72% incidence of BBTD (Selvarajan unpublished). This increased incidence could be due to continuous propagation of bananas as intercrop in coffee plantations, planting new plantations with suckers from infected mother plants and the presence of banana black aphid vector (Pentalonia nigronervosa) round the year. |
| Type(s) of content: | Research Paper |
| Sponsors: | Not Available |
| Language: | English |
| Name of Journal: | Virus Disease (Indian Journal of Virology) |
| NAAS Rating: | 5.95 |
| Volume No.: | 21(2) |
| Page Number: | 110–116 |
| Name of the Division/Regional Station: | Plant Virology |
| Source, DOI or any other URL: | http://link.springer.com/article/10.1007%2Fs13337-010-0020-1#/page-1 |
| URI: | http://krishi.icar.gov.in/jspui/handle/123456789/1771 |
| Appears in Collections: | HS-NRCB-Publication |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| art%3A10.1007%2Fs13337-010-0020-1.pdf | 219.23 kB | Adobe PDF | View/Open |
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