Genetic Resources Resistant to Anthracnose in the Genus Capsicum

摘要

Pepper anthracnose caused by Colletotrichum gloeosporioides and C. acutatum is the most destructive disease affecting the Capsicum genus, causing serious yield loss and quality deterioration in many Asian countries including Korea. C. annuum is the major cultivated species worldwide, but many attempts to find resistant resources to the disease have been failed during the last two decades. A total of 326 pepper accessions within five domesticated Capsicum species were screened using a microinjection method to identify genetic resources for anthracnose resistance. Only 12 accessions belonging to C. baccatum displayed low disease incidence. Among them, PBC80 and PBC81 were selected to be the highest resistant lines and used to more-thoroughly examine their resistant properties for resistance breeding. Both lines were comparatively resistant to Colletotrichum pathogens isolated from Taiwan and Indonesia, as well as from Korea. In addition, their strong resistance was well maintained even through natural field infections in Korea, Indonesia, and India. Both accessions seemed to be reliable and usable genetic resources for anthracnose resistance and could be used to develop resistant varieties of chili pepper if we can use interspecific hybridization.