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Nucleic Acids Research, 1988, Vol. 16, No. 1 229-249
© 1988

Articles

Infectivity and complete nucleotide sequence of the genome of a South African isolate of maize streak virus

Sondra G. Lazarowitz

Department of Embryology, Carnegie Institution of Washington 115 W. University Parkway, Baltimore, MD 21210, USA

Received August 25, 1987. Revised November 10, 1987. Accepted November 10, 1987.

The complete infectious genome of a South African isolate of the geminivirus maize streak (MSV-S) has been cloned, characterized, and sequenced. Using an A. tumefaciens Ti plasmid delivery system, the cloned 2.7 kb single circular MSV component was shown to be necessary and sufficient for infection of maize. Based on sequence analysis of the infectious clone, MSV-S is highly homologous to the previously characterized Kenyan and Nigerian isolates. While the genomic organization of MSV-S has elements in common with each of these previously characterized isolates, it is identical to neither and its analysis addresses the discrepancies between then. The result is a somewhat simplified and unified picture of the viral genome, the structural organization of which is essentially identical to that of wheat dwarf virus.


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[Abstract] [Full Text]


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