Again, these factors do not increase the yield, but only protect the yield potential that has been built through proper selection and utilization of the yield-building factors.
再强调一遍，这些因素不能增加产量，但如应用得当，可使产量形成因素达到的产量潜势得到保护。
The problems of selection and utilization of parent, setting of crossing, and increasing the origin of genetic composition were further analyzed and discussed in details.
并对亲本选择利用，杂交组合的配置，扩大遗传组成源等方面进行分析探讨。
应用推荐