GGE BIPLOT ANALYSIS FOR YIELD AND QUALITY ô€€ STABILITY IN TWO ENVIRONMENT TRIALS OF ALFALFA GENOTYPES (MEDICAGO SATIVA L.)ô

Two field experiments were carried out to find out yield and yield components of different genotypes of alfalfa in two environments. Yield and yield components (dry matter, crude protein, ADF, NDF, RFV content and ME value) of our varieties (Kayseri, Elçi, Bilensoy, WL 414 (MA 414) and a native cultivar of alfalfa was investigated under two different environmental conditions during 2012- 2013 and 2013-2014seasons that were combined in a GGE-Biplot analysis. The locations were the provinces of Igdur and Kars. The experiments were arranged in randomized complete block design (RCBD) with four replicates in each experiment. In the study, herbage yield, dry matter yield, crude protein content, ADF, NDF, RFV and ME values were analyzed. Within the environment, the main effect of a genotype was significant. The combined analysis of variance for plant height, herbage yield and dry matter data indicated that the differences among all sources of variation were highly significant (P