Год выпуска: 2012 Автор: Sagheer Atta Издательство: LAP Lambert Academic Publishing Страниц: 148 ISBN: 9783659209963
Описание
Citrus tristeza virus (CTV) is distributed worldwide, and is the causal agent of one of the most economically important and destructive diseases of citrus.Direct tissue blot immuno-assay (DTBIA) and reverse transcription polymerase chain reaction (RT-PCR) were used to pre-select CTV isolates. CTV-infected samples were then preserved in the sweet orange by graft-inoculation. The target sequences of the major coat protection gene (p25 gene) were amplified from the CTV-infected samples using RT-PCR, and the p25 genes of these isolates were analyzed by RFLP and SSCP for investigating the p25/Hinf I RFLP groups. Genetic differences and genetic relationships and the sequences of 4 genomic regions p23, p20, p18, and p25 of the 21 CTV isolates were amplified and sequenced using RT-PCR and with a sequencer. Using sequence analysis, the differences were therefore estimated among the CTV isolates from cultivated citrus. Citrus exocortis viroid (CEVd), Citrus bent leaf viroid (CBLVd), Hop stunt...
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