Abstract: To objectively and comprehensively analyze the yielding ability, stability and adaptability of new maize varieties in Yunnan
province, a two-year randomized block experiment was conducted on 14 new maize varieties at 12 regional pilot sites in Yunnan
Province from 2019 to 2020. Haihe No.2 was used as the control variety. Variance analysis, coefficient of variation analysis, fitness
analysis, C.S.lin and AMMI methods were used to comprehensively analyze the yielding ability, stability and adaptability of the new
varieties. The results showed that the interaction among varieties, pilot sites, and between varieties and pilot sites reached a highly
significant level. The tested varieties Diyu 403, Diyu 503 and Jinli 66 are relatively ideal varieties with good yielding ability and
stability. Xuanwei is the most ideal pilot sites, with strong variety selectivity, which is conducive to breeding excellent maize varieties.
This study evaluated the production performance of a series of new maize varieties in Yunnan Province, laying a theoretical and
practical foundation for promoting the development of maize industry and the ecological layout of plateau characteristic agriculture in
Yunnan Province.

Key words: new maize varieties, yielding ability, stability, adaptability, Yunnan Province