Abstract:

With six group data of midlate northwest group country regional trial in 2005-2010, stability analysis of varieties was compared using LR model and AMMI model. The results showed that 92-24-144 had higher dynamic stability and showed consistent performance in 2005-2010. The results of AMMI model indicated that there was difference in stability of different varieties. The stability of Qing 97-1-38 and 92-24-144 were higher while the stability of Zhongshu 36, Gan L981018 and Zhuangshu NO.3 were lower, but most varieties showed consistent performance from year to year. Therefore, the AMMI model had the higher reliability in stability evaluation of variety, which should be adopted in potatoes regional trial analysis．

Key words: potato, variety, stability, analysis