벼 縞葉枯病 耐病性品種 育成을 爲한 基礎的 硏究

Basic Studies on Breeding of Resistant Rice Varieties to Stripe Virus Disease

Four by four diallel cross analysis was employed to investigate the nature of actions and distrubtion of genes involved in the inheritance of stripe virus disease in rice varieties. Milyang,No. 15, Tongil, Norin No.6 and Chukoku No. 46 were selected as the parental varieties, and these parents and their corresponding F’₂s were grown to count the infested degrees in percentage. The diallel analysis revealed that resistance to stripe virus disease was polygenetically inherited and exhibited partial dominance in all varieties used, except three varieties-Milyang No. 15, Tongil and Chukoku No. 46-Which are resistant varieties to stripe virus diseases. The results also showed that Norin No.6 was susceptable variety to stripe virus disease, and among three resistant varieties, Tongil variety is better variety than Milyang No.15 and Chukoko No. 46 in order to breed the resistant varieties to stripe virus disease.