멸구類에 대한 手稻 品種抵抗性의 遺傳 Ⅰ. 벼멸구에 대한 抵抗性의 遺傳

Inheritance of resistance to plant and Leaf-hoppers of rice varieties Ⅰ. Inheritance of resistance to brown plant-hopper(Nilaparvata Lugens Stal)

Six crosses were made to study the inheritance of resistance to brown planthopper(Nilaparuata lugens Stal.) with four resistant rice varieties, Mudgo, Co 22, IR 2061 and A.SD 7, and two susceptible breeding lines, Wx 126 and Wx 206. Seedling reactions to brown planthopper in hybrid populations were checked individually, and the results obtained are summarized as follows; 1. A single dominant gene controlled the resistance of Mudgo, Co 22 and IR 2061. The resistance of ASD 7 was conditioned by a single recessive gene. 2. It was found that the resistance gene in IR 2061 was as same as in Mudge. 3. The reaction of the resistance gene to brown planthopper found in Korea was as same as in Philippines and Taiwan. 4. The resistanec gene to brown planthopper in IR 2061 was inherited independently from the gene controlling the smoothness of leaf blade.