Genotypic diversity of beet curly top virus

Includes bibliographical references.The genotypic diversity of beet curly top virus (BCTV) present in the western United States has been examined by the analysis if 58 field isolates and eight laboratory or nursery isolates of the virus. Full-length clones for each isolate have been characterized for genotype by restriction endonuclease mapping. Only variants of the CFH and Worland strains were recovered from field isolates. Variants of the Cal/Logan strain were found only in laboratory or nursery isolates.B.S. (Bachelor of Science