DETECTION OF DNA POLYMORPHISMS IN GLASSY-WINGED SHARPSHOOTERS (HOMALODISCA COAGULATA) BY PCR-BASED DNA FINGERPRINTING METHODS

• Author(s): Jones, Jes?s;
• Abstract: The glassy-winged sharpshooter Homalodisca coagulata (Say) (Homoptera: Cicadellidae), is a xylem feeding leafhopper that is a serious pest because it vectors a strain of Xylella fastidiosa, a bacterium that causes Pierces disease of grapevines (Turner and Pollard 1959; Nielsen 1968). DNA markers have proved to be valuable tools for population genetic studies. DNA fingerprinting methods that do not require prior knowledge of genome sequences include ISSR-PCR (Inter-Simple Sequence Repeat-Polymerase Chain Reaction), RAMP (Randomly Amplified Microsatellite Polymorphisms), SAMPL (Selective Amplification of Microsatellite Polymorphic Loci) and RAPD (Random Amplification of Polymorphic DNA). RAPDs produce dominant markers, whereas ISSR-PCR, RAMP, and SAMPL incorporate Simple Sequence Repeats (SSR) and are capable of identifying co-dominant markers if utilizing 5-anchored or compound ISSR primers (reviewed in Karp and Edwards 1997), but without known family relationships (segregation/backcrosses) these markers are scored as dominant.
• Publication Date: Dec 2002
• Journal: 2002 Pierce's Disease Research Symposium