Analysis of characteristics and stability of peanut yield in different ecological regions of Shandong Province

Variation and stability of pod yield and yield components were analyzed for six peanut varieties at 19 ecological regions in Shandong Province. The results show significant effect of environment, variety and interaction of environment and variety on pod yield variation and yield components in both spring and summer cultivation seasons. Among the factors, environment has the most obviows effect, followed by crop variety. Crop variety has more obvious effect on pod number per kg and seedtopod ratio than environment. “Luhua 11” grown in spring has a stable pod number per plant. Also springplanted “Fenghua 5” and “Huayu 23” and summerplanted “Huayu 22”, “Fenghua 5” and “Weihua 8” have stable seed-to-pod ratio. Yield and pod number of all varieties exhibit great variations with location. Results suggest that “Huayu 22” and “Weihua 8” are the best spring varieties in eastern Shandong Province and “Weihua 8”, “Luhua 14”, etc are the best summer and spring varieties in central and western Shandong Province.