Clonal and sexual propagation in Botrytis elliptica

Genetic variation was found between isolates of Botrytis elliptica from the USA and Taiwan based on 22 polymorphic markers from five RAPID primers. Am ong these 69 isolates, there were 43 different genotypes. One clonal genoty pe was found spanning Oregon and Washington, USA, and in a population from Hsinshe, Taiwan, clonal genotypes were frequent, demonstrating the importan ce of asexual spread of this pathogen. However, when only unique genotypes were considered, gametic disequilibrium among putative RAPD loci of the gen otypes from Taiwan (33) or Hsinshe (23) was not detected, suggesting an und erlying sexual recombination system for this population of B. elliptica. A weak level of cultivar specialization was defected among B. elliptica isola tes from the Hsinshe population based on analysis of genetic distances betw een isolates.