Journal
VIRUS GENES
Volume 39, Issue 1, Pages 113-119Publisher
SPRINGER
DOI: 10.1007/s11262-009-0359-9
Keywords
Rice tungro bacilliform virus; Coat protein; Virus resistance; Transgenic rice
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Funding
- Department of Biotechnology, Government of India, New Delhi [BT/AB/NP/07/98]
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Rice tungro, a devastating disease of rice in south and southeast Asia, is caused by the joint infection of Rice tungro bacilliform virus (RTBV) and Rice tungro spherical virus (RTSV). In order to obtain transgenic resistance against RTBV, indica rice cultivar Pusa Basmati-1 was transformed to express the coat protein (CP) gene of an Indian isolate of RTBV. Rice plants containing the transgene integrated in low copy numbers were obtained, in which the CP was shown to accumulate in the leaf tissue. The progenies representing three independent transformation events were challenged with Indian isolates of RTBV using viruliferous Green leafhoppers, and the viral titers in the inoculated plants were monitored using DNA dot-blot hybridization. As compared to non-transgenic controls, two independent transgenic lines showed significantly low levels of RTBV DNA, especially towards later stages of infection and a concomitant reduction of tungro symptoms.
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