九农20号大豆新品种是吉林市农业科学研究所于1992年育成,1993年定为推广品种。该品种是1984年以九交8014—21—2为母本,吉林20号为父本进行有性杂交,当年冬季在海南岛培育F_1代,1985年在所内进行F_2代选拔,当年冬季又去海南岛进行F_3代选拔,1986——1987年在所内进行F_4代选拔和F_5代品系决选,1988年进行品种比较试验。以后进行全省预备试验、区域试验和生产试验,1993年1月经吉林省农作物品种审定委员会审定通过,定为推广品种,并命名为九农20号(原编号为九交8436—6—5)。本品种为中熟品种,亚有限结荚习性,株高100厘米左右,披针叶、紫花、荚密、大粒、四粒荚较多。主要特 Nine new varieties of soybean farming on the 20th of Jilin City Institute of Agricultural Sciences bred in 1992, 1993 as a promotion of varieties. The variety is in 1984 to nine crosses 8014-21-2 as the female parent, Jilin 20 as the male sexual hybrids, when the winter cultivation of F_1 in Hainan Island, 1985 in the F_2 generation selection, when the winter went Hainan Island F_3 generation of selection, 1986 - 1987 in the selection of F_4 generations and F_5 generation of strains of the final election, in 1988 varieties of comparative trials. After the province’s preliminary test, regional test and production test, approved by Jilin Province Crop Variety Approval Committee in January 1993, it was designated as a promotion variety and named as Nine Farmers No. 20 (formerly No. 9 Jia 8436-6-5) . The varieties of medium varieties, Asia limited pod habit, about 100 cm in height, lanceolate, purple, pod dense, large grain, four pods more. The main special