江西晚稻“籼改粳”候选品种对稻曲病的抗性评价

采用人工注射接种和田间自然抗性鉴定共鉴定了16个粳稻品种对稻曲病的抗性。温室人工接种结果表明,16个供试品种中鉴定为抗、中抗、中感、感、高感的品种(品系)分别有1、4、3、6和2个;田间自然抗性鉴定结果在两地有一定差异,其中在永修鉴定结果为抗、中抗、中感、感、高感的品种(品系)分别有1、3、3、6和3个,在修水鉴定为抗、中抗、中感、感、高感的品种(品系)分别有3、2、3、7和1个。综合人工注射接种和田间自然抗性鉴定的结果,不同水稻品种对稻曲病的抗性有着显著性的差异,对稻曲病表现为抗病的品种有小叶迟熟、浙科优2854、Ⅱ优7954、池优65,但多数甬优系列品种感稻曲病。本研究结果可为江西双季稻区晚稻"籼改粳"品种布局及稻曲病的综合防治提供依据。

Resistance Evaluation of Late Rice Cultivars of Japonica Rice Switched from Indica Rice Against Rice False Smut in Jiangxi

The resistance of 6 Japonica rice cultivars against rice false smut in Jiangxi Province was iden-tified by natural field induction and artificial inoculation. Through artifical inoculation in greenhouse 1,4,3,6 and 2 cultivars showed resistant( R) ,moderately resistant( MR) ,moderately susceptible( MS) ,susceptible( S) and high susceptible(HS) respectively.Through natural field induction 1,3,3,6 and 3 cultivars in Yongxiu showed R,MR,MS,S and HS respectively,and in Xiushui 3,2,3,7 and 1 cultivars showed R,MR,MS,S and HS respectively.The results showed that there were significant differences in resistance against rice false smut in different cultivars. Majority of the cultivars of Yongyou series were susceptible;varieties such as Xiaoyech-ishu,Zhekeyou 2854,ⅡYou 7954 and Chiyou65 showed good resistance. The results provide a basis for the layout and disease control of rice cultivars of Japonica Rice switched from Indica in Jiangxi Province.