摘要
用生物间遗传学的毒力频率测定和联合致病性分析的方法，对广东省部分将推广杂交稻组合的抗瘟性进行了鉴定．21个待测杂交稻组合用100个田间菌株进行接种，其中14个组合的毒力频率小于对20％，表现出较好的抗性；联合致病性系数（PAC）、联合抗病性系数（RAC）和联合毒性系数（VAC）分析杂交稻组合与稻瘟病菌群体间的相互作用，结果表明：50个杂交稻组合间的两两搭配的联合抗病性系数较高（≥0．80）、联合强毒性系数较低（≤0．02），均具有较好的抗性．并对杂交稻组合的抗性遗传背景进行了分析．
The resistance of hybrid rice combinations to the rice blast fungus (Magnaporthe grisea) was evaluated by using the methods of Virulence Frequency (VF) and Pathogenicity Association. 21 hybrid rice combinations were inoculated with 100 isolates. Among them, 14 combinations with the VF lower than 20% showed the high resistance to the rice blast fungus. The interactions between hybrid rice combinations and the populations of rice blast fungus were analyzed with pathogenicity association coefficients (PAC), resistance association coefficients (RAC), and virulance association coefficients (VAC). 50compositions with high RAC (≥0. 80) and lower VAC (≤0. 02) showed high resistance. In addition,the resistant genetics of different combinations was discussed.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
1999年第4期10-14,共5页
Journal of South China Agricultural University
关键词
稻瘟病
抗病性
毒力频率
联合致病性
rice blast
resistance
virulence frequency
analysis of pathogenicity association
