“苏豆 4号”由江苏省农业科学院经济作物研究所大豆研究室育成。 1984年配制杂交组合“中豆 2 4”ד苏系 5号” ,1988年采用综合选择法选择优良单株 ,1989年对决选的单株进行株行种植 ,其中 1个株行表现优良 ,被定名为“88 ｍ2 1” ,1990～ 1991年种植鉴定圃 ,1992～ 1994年 “Soudou No. 4” by Jiangsu Academy of Agricultural Sciences Institute of Economic Crops Soybean breeding. In 1984, the hybrid combination “Zhong Dou 2 4” × “Suyou 5” was prepared. In 1988, the excellent single plant was selected by the comprehensive selection method. In 1989, the plants of the single plant were planted. Among them, 1 plant performed well, It was named as “88 m2 1”. From 1990 to 1991 planting appraisal garden, from 1992 to 1994