The analysis on the data from the region experiments for two years. The result shows that Yu Yu22,a new corn variety with high and stable yield,is an ideal variety to substitute Dan Yu13 at present.

• 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。