| To explore the relationship between maize yield and agronomic traits,a multi-site variety experiment was conducted over one growing season,with 52 silage maize combinations planted in Tangshan,Chengde,Pingquan,and Zhangjiakou.The results showed that,based on a comprehensive assessment of yield potential and stability,six combinations were rated as excellent. Among them,combination V38 exhibited the highest yield effect value (1.0372),while combination V29 demonstrated the lowest yield variability across locations (3.781 2). Correlation analysis and stepwise linear regression analysis of agronomic traits indicated that ear height had a direct negative effect on yield,whereas rust resistance exhibited a positive effect. Together,these two factors accounted for 14% of the total yield variation. Based on a Euclidean distance of 13.6，cluster analysis of yield and its influencing factors classified the maize combinations into six distinct groups. |
