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栽培大豆杂交，其Ｆ２代的结瘤指数、单瘤重和植株全氮（％）都有超亲现象，其综合等级指数则只有杂交优势，杂交后代固氮遗传力较低，受环境影响稍大。
Cultivated soybean hybrids, the F2 generation of nodulation index, single tumor weight and plant total nitrogen (%) have super-progeny phenomenon, the composite grade index is only the hybrid advantage of hybrid progeny lower heritability, affected by the environment slightly larger .