皖豆2号原名青阳早黄豆选,系安徽省农业科学院作物所于1976年鉴定皖南大豆地方品种时采用混合选择法从青阳早黄豆群体中选出优异单株,再经多代系统选育而成。该品种比青阳早平均株高矮15厘米,且单株80%复叶具有5片小叶。比青阳早增产20%以上。蛋白质含量高,据1982～1985年连续4年测定, Wandou No. 2, formerly known as Qingyang early soybeans election, the Department of Crop Sciences, Anhui Academy of Agricultural Sciences in 1976 identification of Southern Anhui Province, the local varieties of soybean hybrid selection method was used to select the early Qingyangyangyongquanyuan outstanding individuals, and then by the multi-generation system Education. The breed had a height of 15 cm shorter than the average early age of Qingyang and had 80 leaflets with 5 leaflets. Early increase of more than 20% of Qingyang. High protein content, according to 1982 to 1985 for four consecutive years measured,