在进行大豆杂交育种时,往往每年都要配制大量的杂交组合。但育种的经验证明,后期育成的优良品系,大多出自少数优良组合。因此,在杂交的早期世代,如能大体判别出这些少数优良组合,扩大这些优良组合的群体,并集中对这些少数优良组合进行选择,不但可以摆脱由于杂交组合繁多,造成工作量庞大的沉重负担,而且能使优良组合群体扩大,选得优良材料的机率大大增加。 In soybean cross breeding, it is often necessary to formulate a large number of hybrid combinations each year. However, the breeding experience shows that the later breeding of fine lines, mostly from a small number of excellent combinations. Therefore, in the early generation of hybridization, if we can generally identify these few excellent combinations, expand these excellent combinations, and focus on the selection of these few fine combinations, we will not only be able to get rid of the heavy workload caused by the large number of hybrid combinations , But also to expand the population of excellent combinations and greatly increase the probability of selecting good materials.