水稻品種 水原334號와 水原341號의 百葉枯病 抵抗性 遺傳

Inheritance of resistance to bacterial leaf blight(xanthomonas campestris Pv. oryzae) on Korean rice varieties, Suweon 334 and Suweon 341

For determining the inheritance of bacterial leaf blight(BLB) resistance to representative three isolates, 860485(K₁), 860474(K₂) and 860468(K₃) from Korea, Suweon 334 and Suweon 341 which are resistant varieties were crossed with susceptible variety, Jinbu 5. The F₁, and F₂ plants were tested for their reactions to the 860485, 860474 and 860468 isolate at their maximum tillering stage. BLB resistance to 860485 isolate was controlled by two dominant genes of Suweon 334, but by a single dominant gene of Suweon 341 in case of scoring date August 4 and August 14, respectively. BLB resistance to 860474 isolate was controlled by complementary genes of Suweon 334 and Suweon 341 in case of scoring date August 4 and August 14, respectively except for scoring date August 14 of Suweon 341/Jinbu 5 cross combination. BLB resistance to 860468 isolate was controlled by a single dominant gene of Suweon 334 and Suweon 341 in case of scoring date August 4. However, resistance to 860468 isolate on scoring date August 14 influcenced by complementary genes of Suweon 334 and Suweon 341.