Multigene phylogenetic analysis of inter- and intraspecific relationships in Venturia nashicola and V. pirina

作者：Zhao Peng; Kakishima Makoto; Uzuhashi Shihomi; Ishii Hideo^*

来源：European Journal of Plant Pathology, 2012, 132(2): 245-258.

DOI：10.1007/s10658-011-9869-0

• Evolution
• Pear scab
• Phylogenetic analysis
• Venturia nashicola
• Venturia pirina

Isolates of Venturia species isolated from pear in Japan, China, Taiwan and Israel were used in this study to analyze their molecular phylogenetic relationship. The nucleotides of rDNA-ITS, partial beta-tubulin and elongation factor 1 alpha genes were sequenced directly after PCR. Based on these sequence data two phylogenetic groups could be distinguished. Isolates collected from Asian pears such as Japanese and Chinese pears formed a distinct evolutionary lineage from those derived from European and Syrian pears. This result corroborated the early taxonomic separation of V. nashicola from V. pirina. In addition, trees from single-locus data sets and the combined data set showed that all isolates of V. nashicola were included in a monophyletic group and representative isolates of five pathological races originating from different locations and cultivars formed a single lineage. In contrast, two distinct evolutionary lineages were revealed in V. pirina and isolates of five races were scattered in two lineages. Israeli isolates of race 2 as well as two Japanese isolates of V. pirina formed a distinct lineage from other isolates of this species, while other Israeli isolates belonging to races 1, 3, 4, and 5 were closely related to each other and formed another lineage. It was indicated that the evolution of pathological races in V. nashicola might have occurred relatively recently as compared with V. pirina.

• 出版日期2012-2