毒力频率在水稻抗稻瘟病性中的应用

Pathgenetic Frequencies of Pyricularia oryzae Cav. to Rice Varieties and Hybrid Combinations

运用毒力频率，分析贵州省部分水稻品种（组合）与稻瘟病菌群体间的相互关系。结果表明，在常规稻中，特三矮２号，胜优２号毒力频率值最低；杂稻组合中，佛－青优青的毒力频率值最低。汕优多系１号，威优４６７、冈优１２、冈优２２的毒力频率值均低于汕优６３（ＣＫ）。毒力频率在不同地区间有差异。通过联合抗病性分析，提出了抗性较好的品种（组合）搭配。

This paper analysed the corrclation between rice varieties(and hybrid combinations)and populations of Pyricularia oryzae Cav.results showed that Tesanai 2 and Shenyou 2 among coventional rice,and Fuo qingyouqin among hybrid rice had the lowest pathogenetic frequeucies The pathogenetic frequencies of hybrid reombimation Shanyouduoxi 1,Weiyou 467、Gangyou 12 and Gangyou 22 were lower than that of Shanyou 63(CK). The pathogenic frequencies of Pyricularia Orzae Cav.varied in different areas,Some better assortments of rice varieties and hybrid combinations were given after conducting pooled resistance analysis