The results showed that Yingxian small black soybean was against the development of SCN3, especially J2 to J3 and J3 to J4;and the ratio of female-male was affected.

• 结果表明：应县小黑豆为抗扩展品种，对SCN3明显抑制J2向J3，J3向J4的发育，并且对SCN3的雌雄分化有一定影响。