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The coat protein gene isolated from Papaya ringspot virus, Thai isolate, was used to generate transgenic papayas. A binary vector containing the coat protein gene under the control of a 35S promoter, was constructed and transformed into somatic embryos of papaya cultivar Khak Dum by microprojectile bombardment. Eight transgenic lines were identified from 1980 bombarded calli of papaya somatic embryos...
Transgenic papayas carrying the papaya ringspot virus coat protein gene were inoculated with Papaya ringspot virus. Infection was monitored by evaluating symptoms and by reverse transcription polymerase chain reaction (RT-PCR). Among eight tested transgenic lines, clone G2 was found highly resistant to virus infection during 3 years of testing. Further analysis of this clone revealed complex multicopy...
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