籼稻品种对三个白叶枯病菌系的抗性遗传分析

GENETIC ANALYSIS OF RESISTANCE TO BACTERIAL BLIGHT IN INDICA RICE

分析和研究了全生育期表现抗病的5个籼稻品种二九丰、三黄占2号、川植5号、扬稻1号和83007对3个水稻白叶枯病菌系HB84-17、PXO16和T7174的抗性遗传,对这5个抗病品种分别与感病品种沈农1033或金刚30杂交的F_1、F_2和B_1F_1群体植株对供试3个菌系的抗性反应和分离世代植株抗感分离比例的分析结果表明:供试的5个籼稻抗病品种对菌系HB84-17和PXO61的抗性均由一对显性基因控制,对菌系T7174的抗性均由二对独立遗传的显性基因控制,其中一对能控制对这3个菌系的抗性,另一对只控制对菌系T7174的抗性而对菌系HB84-17和PXO61表现为感病。

The inheritance of resistance to 3 strains of Xanthomonas campestris pv. oryzae, HB84-17, PXO61 and T7174, in five indica rica cultivars, Er Jiu Feng, San Huang Zhan 2, Chuan Zhi 5, Yang Dao 1 and 83077 was studied. The analysis of F_1, F_2 and B_1F_1 populations derived from crosses between the five resistant cultivars and susceptible cultivar, Shen Nong 1033 or Jin Gang 30, revealed that one dominant gene was responsible for the varieties'resistance to HB84-17 and PXO61, and this speroum of resistance would estand to T7174 when an additional independently interited dominant gene was also existed.