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Genetic diversity of Sugarcane bacilliform virus isolates infecting Saccharum spp. in India.

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Title Genetic diversity of Sugarcane bacilliform virus isolates infecting Saccharum spp. in India.
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Creator Karuppaiah, R., R. Viswanathan and V. Ganesh Kumar
 
Subject Sugarcane, Sugarcane bacilliform virus, Badnavirus, Leaf freckle, Genome variation, India
 
Description Not Available
Sugarcane bacilliform virus (SCBV), which causes leaf freckle in sugarcane, is a member of the genus Badnavirus. Studies were conducted to characterize SCBV in Saccharum officinarum germplasm and cultivated varieties in India by sequencing the complete genomes of five isolates. Genome lengths ranged from 7553 to 7884 nucleotides. Duplications in ORF 3 and insertions in the RNase H domain in some of the isolates were found to contribute to the large size of their genomes. The Indian SCBV isolates share identities of 69-85% for the complete genomic sequence, indicating wide genetic diversity among them, and share 70-82% identity with Sugarcane bacilliform Ireng Maleng virus (SCBIMV) and Sugarcane bacilliform Morocco Virus (SCBMV), as well as 43-46% identity with Banana streak virus (BSV) and BSV-related SCBV species from Guadeloupe, indicating that the Indian SCBV isolates is distinct from SCBV isolates reported to date. Irrespective of the region compared, SCBV isolates from India, Australia and Morocco clustered together. BSV and BSV-related SCBV sequences from Guadeloupe formed another cluster. A phylogenetic analysis based on the partial RT/RNase H sequence separated SCBV and BSV-related SCBV sequences into 11 SCBV groups viz., SCBV-A to -K. Among the 11 groups, the SCBV sequences separated under H, I, J and K are newly identified in this study, representing three new species and are tentatively named as SCBBBV, SCBBOV and SCBBRV. Thus the PASC and phylogenetic analyses evidenced that the symptoms associated with badnaviruses in sugarcane in India are caused by at least three new species, SCBBBV, SCBBOV and SCBBRV, besides SCBIMV and SCBMV represented by SCBV-BT and SCBV-Iscam, respectively
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Date 2021-11-27T09:02:35Z
2021-11-27T09:02:35Z
2013-06-01
 
Type Research Paper
 
Identifier 26
0920-8569r
http://krishi.icar.gov.in/jspui/handle/123456789/67885
 
Language English
 
Relation Not Available;
 
Publisher Springer US