大豆种质资源对大豆疫霉病菌抗病性测定

采用下胚轴伤口接种方法,用混合菌种测定80份大豆种质资源对大豆疫霉病菌的抗病性;同时测定69份大豆种质对大豆疫霉病菌7个生理小种的抗性谱。在重复测定中表现抗病的材料有6份,占供试材料的7.5%;表现中抗的材料12份,占供试材料的15%;感病材料为62份,占供试材料的77.5%。对大豆疫霉病菌7个生理小种(1、3、9、11、17、21、24)全抗的材料有12份,占供试材料的17.4%;对七个生理小种(1、3、9、11、17、21、24)表现中等抗性的有4份,占供试材料的5.8%;1份材料对1号、9号、11号、24号表现中等抗性,占供试材料的1.5%;无论在混合菌种和分生理小种测定中,在相同的材料上抗性反应是一致的。

IDENTITICTION THE RESISTANCE OF SOYBEAN GERMPLASM TO PHYTOPHTHORA SOJAE

Eighty soybean germplasmlines were investigated for their resistance toPhytophthora sojaeu-sing mixed culture by the hypocotyls inoculation technique.And the same ti me,the resistance of 69 linesto 7 physiological races ofPhytophthora sojaewereidentified.The results indicate that 6 lines resistant toPhytophthora sojae,12 lines intermediate response and 62 susceptible toPhytophthora sojae,the propor-tion were 7.5 %,15 %and 77.5 %respectively.Among the tested lines,12 resistant to 7 physiologicalraces ofPhytophthora sojae(1,3,9,11,17,21,24) and 4 showed intermediate response,the ratio are 17.4 %and 5.8 %.Only 1 line showedintermediate response to race Number 1,9,11 and 24,rate 1.5 %.Bothin mixed culture tests and single physiological race tests,the resistance of equal lines toPhytophthorasojaewas the same.