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Bean golden mosaic virus is the etiological agent of bean golden mosaic disease in Cuba



Bean golden mosaic virus is the etiological agent of bean golden mosaic disease in Cuba



Phytopathology 92(6 Suppl.): S119



Cuba, the first report of bean golden mosaic (BGM) disease associated with high population of Bemisia tabaci in Cuba was made in the 70's. Bean leaves (Phaseolus vulgaris L.) showing typical golden mosaic symptoms were gathered from Havana, Matanzas, Santa Clara and Holguin fields during 1998-1999. The same DNA extractions were further analysed by PCR using two degenerate primer sets (PAL1v 1978-PAR1c 715 and PAL1c1960-PAR1v 722). Fragments of approximately 1.4kb and 1.3kb were amplified and cloned. RFLPs analysis of the cloned 1.4kb fragments was performed with restriction enzymes indicating that they shared identical restriction pattern. In addition, the nucleotide sequence for a clone corresponding to Holguin's infected bean plant was obtained and compared using BLAST. The relatedness of the Cuban isolate with the other begomoviruses was confirmed by multiple sequence alignments of the common region (CR) and partial nucleotide sequences of replicase (rep) gene. The best percentage of identity for rep was 94% with any of BGMVs mentioned above. In the case of CR, the scores were BGMV-GA 93%, BGMV-MX and BGMV-PR 92% and BGMV-DR 91%.

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