Abstract
Pierce's disease (PD) strains of Xylella fastidiosa were identified by random amplified polymorphic DNA (RAPD) fingerprinting. Two random primers including OPA-03 (agtcagccac) and OPA-11 (caatcgccgt) were found to be efficient for differentiating PD strains isolated from a vineyard in North Florida in 1996 (129 strains) and 1997 (29 strains) from non-PD strains of X. fastidiosa (citrus variegated chlorosis, mulberry leaf scorch, periwinkle wilt, plum leaf scald, and phony peach) and strains from Xanthomonas campestris pv. vesicatoria and Escherichia coli. This study shows that RAPD fingerprinting is a useful tool to supplement the conventional symptoms-colony morphology-slow growth identification procedure routinely used to identify the PD pathogen.
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