对两年区试结果分析表明，豫玉２２号（豫单８７０３）属高产、稳产型玉米新杂交种，是目前替代丹玉１３的理想品种。由于其含有热带亲本血缘，因此，它的推广应用也有利于改善目前生产上品种单一老化、遗传基础狭窄的状况。 The results of two-year regional trial showed that Yuyu 22 (Yudan 8703) is a new hybrid with high yield and stable yield, which is the ideal substitute for Dan Yu 13. Because of its tropical parental blood, therefore, its promotion and application will also help to improve the current production of a single species of aging, the genetic basis of the narrow situation.