夏大豆生产集中于我国黄淮地区,播种面积占全国40%以上,其中河南、山东常年播种2000多万亩。但生产中普遍存在单产低而不稳和品质差的问题。因此,近年来科研单位进行了高产、优质、多抗新品种的选育,现已育成了一批新品种。研究和育种实践证明,品种的丰产性与稳产性是受不同的基因系统控制的,同一品种在不同地点往往 Summer soybean production concentrated in China Huanghuai area, sown area accounts for more than 40% of the country, of which Henan, Shandong perennial planting more than 2000 mu. However, there is a widespread problem of low and unstable yields and poor quality in production. Therefore, in recent years, research institutes have carried out breeding of new varieties of high yield, high quality and multi-resistance. Now a batch of new varieties have been bred. Research and breeding practice have proved that the high yield and stable yield of varieties are controlled by different gene systems, and the same variety tends to be in different locations