大豆新种质对大豆孢囊线虫4号生理小种的抗性鉴定

Evaluation of New Soybean Germplasm for Resistance to Race 4 of the Soybean Cyst Nematode

1996～ 2 0 0 0年 ,采用病圃自然感病鉴定法 ,对我国 7省 518份大豆新种质资源进行了抗大豆孢囊线虫 4号生理小种的鉴定研究 ,筛选出 3个新的抗病品种。这些抗病品种均来自山西 ,种皮为黑色 ,每株平均孢囊数在 0 2～ 0 6之间 ,孢囊指数为 0 4～ 0 6,抗性强而稳定 。

During 1996-2000,518 accessions of new soybean germplasm from 7 provinces of China were evaluated for their resistance to race 4 of soybean cyst nematode(SCN)by natural infection in the field.Three new resistant varieties to race 4 of SCN were obtained.These resistant varieties were all from Shanxi,and all with black seed coat.Their average number of cyst per plant were 0 2-0 6,and cyst index were 0 4-0 6,so that they can be utilized in resistant breeding due to high resistance and stability.