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对６个栽培大豆与半野生大豆杂交组合及９个回交组合进行了分析。结果表明：大豆品种间杂种优势是普遍存在的，而且主要表现在产量性状上，百粒重的杂种优势及超亲优势为负值，超亲优势的表现与杂种优势的表现基本相同。杂种后代植株高、分枝多、籽粒小是半野生大豆在育种工作中利用的障碍。以有限性品种做回交亲本对种间杂种后代降低株高效果最佳，亚有限品种次之，无限品种效果最差。为克服杂种后代的小粒性，必须用大粒亲本进行回交并进行定向选择。在蛋白质含量上用高蛋白品种进行连续回交，可逐年提高杂种后代蛋白质含量
Six cultivated soybean and semi-wild soybean hybrid combinations and nine backcross combinations were analyzed. The results showed that the heterosis among the soybean varieties was ubiquitous, and mainly manifested in the yield traits. The 100-grain weight heterosis and super-parents had a negative value. The performance of the super-parents showed the same performance as the heterosis. Hybrid offspring plant height, branching, small grain is semi-wild soybean barriers in the use of breeding. Backcrossing parents with limited varieties had the best effect on decreasing plant height of inter-interspecific hybrid progeny, followed by sub-limited varieties. To overcome the smallness of hybrid offspring, backcrossing must be done with large-grain parents and targeted selection. Continuously backcrossing high protein varieties on the protein content can increase the protein content of the progeny of the hybrids year by year