CAJ | 학술논문

16个水稻品种对水稻矮缩病毒(Rice dwarf virus, RDV)的抗性鉴定结果表明:不同水稻品种对RDV的抗性存在明显差异.根据各品种的发病率划分其抗性等级.免疫品种1个,占供试品种的6.25%;中抗品种6个,占37.50%;中感品种3个,占18.75%;高感品种6个,占37.50%.感病品种潜育期较短,为11-15 d左右;抗病品种潜育期较长,为15-20 d左右.水稻品种的发病率与叶蝉带毒率密切相关,相关系数为99.99%.协优46兼具抗虫性和抗病性;宜香2292仅具抗病性;冈优734为免疫品种,是水稻矮缩病抗性育种的良好材料.
16개수도품충대수도왜축병독(Rice dwarf virus, RDV)적항성감정결과표명:불동수도품충대RDV적항성존재명현차이.근거각품충적발병솔화분기항성등급.면역품충1개,점공시품충적6.25%;중항품충6개,점37.50%;중감품충3개,점18.75%;고감품충6개,점37.50%.감병품충잠육기교단,위11-15 d좌우;항병품충잠육기교장,위15-20 d좌우.수도품충적발병솔여협선대독솔밀절상관,상관계수위99.99%.협우46겸구항충성화항병성;의향2292부구항병성;강우734위면역품충,시수도왜축병항성육충적량호재료.
Susceptibilities of 16 bred or extended rice varieties to Rice dwarf virus (RDV) were investigated using pathogenesis rate as an indicator of resistance grade. The results showed that significant variance existed among the varieties. Among the 16 varieties studied, 1 variety was immune to RDV, accounting for 6. 25%; 6 varieties were middle-resistant, accounting for 37. 5%; 3 varieties were middle-susceptible, accounting for 18. 75%; 6 varieties were disease-sensitive, accounting for 37. 5%. The latent period (11-15 d) of susceptible variety, was significantly shorter than that of resistance variety (15-20 d). Further investigations revealed that the infection rate of rice variety correlated with the ration of leafhopper (Nephotrttix cincticeps) carrying virus, and the correlation coefficient was 99. 99%. The results of identification were as follows: both of RDV resistance and insect resistance were high in Xieyou 46 (Oryza sativa L. ssp. indica cv Xieyou 46); Yixiang 2292 (Oryza sativa L. ssp. indica cv Yixiang 2292) had resistance to RDV; Ganyou 734 (Oryza sativa L. ssp. indica cv Ganyou 734) was an immune variety, which was proved to be an ideal material for RDV resistance breeding.