A kiwifruit cultivar crossbred with Actinidia chinensis and Actinidia rufa has practical tolerance to Pseudomonas syringae pv. actinidiae biovar 3
Kisaki, G.; Shimagami, T.; Matsudaira, K.; Tsugi, Y.; Moriguchi, K.; Nakashima, K.; Morimoto, T.; Sugita-Konishi, S.; Tabuchi, M.; Gomi, K.; Ichimura, K.; Hamano, K.; Suezawa, K.; Otani, M.; Fukuda, T.; Manabe, T.; Kataoka, I.; Akimitsu, K.
Journal of Plant Pathology 101(4): 1211-1214
The kiwifruit brand Sanuki Kiwicco (R) comprises five kiwifruit cultivars (KagawaUP-Ki1, -2, -3, -4, and - 5) that are hybrids of Actinidia chinensis and Actinidia rufa, have high quality, small fruits with a sugar content of 17 to 20% and a low level of protease, thus eliminating any mouth irritation. The cultivars of Sanuki Kiwicco (R) are more tolerant to bacterial blossom blight and can be stored longer than previously released cultivar Kosui, another hybrid between A. chinensis and A. rufa. Our investigations using A. rufa, a wild species in warm regions of Japan, revealed efficient transduction of tolerance to bacterial canker disease caused by Pseudomonas syringae pv. actinidiae biovar 3. The Sanuki Kiwicco (R) cultivars also proved to have practical tolerance to the disease caused by biovar 3 in laboratory and field tests.