四川省农科院作物所于1986年用日本引进品种白千成作母本,成都田坎豆作父本杂交,经逐代定向培育选育出大豆新品种成豆七号,于1997年5月通过四川省品种审定委员会审定。 生物学特征特性 该品种具有高产、稳产、适应性广、熟期适中、抗病、抗倒、生长势旺、粒大、籽粒品质优良、商品性好、但耐瘠性 Crops Institute of Sichuan Academy of Agricultural Sciences in 1986 with the introduction of Japanese varieties Baiqian Cheng as female parent, Chengdu Tiankan bean as the male parent, by generation-oriented breeding of new soybean varieties bred soybean No. 7, in May 1997 Approved by the Sichuan Provincial Variety Commission. Biological characteristics of the varieties of high yield, stable yield, wide adaptability, moderate maturity, resistance to disease, anti-down, vigorous growth, grain size, grain quality, good commodity, but barren