过氧化物酶活性变化值与水稻白叶枯病抗性的遗传相关研究  

GENETIC CORRELATION BETWEEN PEROXIDASE ACTIVITY AND THE RESISTIBILITY TO BACTERIAL LEAF BRIGHT IN RICE

作　　者：王润华[1,2] 陈伟栋 刘桂富[1,2] 张尤凯 

机构地区：[1]华南农业大学农学系 [2]华南师范大学生物系

出　　处：《华南农业大学学报》1997年第1期75-80,共6页Journal of South China Agricultural University

摘　　要：研究了水稻白叶枯病单株平均病斑长与病原菌接种前后过氧化物酶活性变化值遗传相关与回归关系，遗传相关系数ｒｇ＝０．８６６。酶活性变化值随病斑长变化的线性回归方程为ｙ∧＝－５１．５１７＋１８．７７８ｘ－０．８７９ｘ２。这表明，感病越强的遗传型，酶活性升高值越大；但高抗病的遗传型，酶活性反而因病原菌侵染而降低。通过病斑长对酶活性变化值作间接选择，相对效率Ｑ＝０．９１０。The genetic correlation and regression between the lenght of lesions and peroxidase activity were studied. The genetic coefficient r g=0.866 and the regressilon y ∧=-51.517+18.778 x - 0.879 x 2 . In general, the more susceptible of the bacteriun, the high of the peroxidase activity in the plants. Hewever, the peroxidase activity decreased in high susceptible varieties. The selection of the genetypes for peroxidase activity by the length of lesions was invalid and the retative rate Q =0.910.

关 键 词：水稻 白叶枯病 抗性 过氧化物酶 遗传相关 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]