Stability analysis of forage yield of common millet promising lines using graphical method

To investigate the stablity of common millet, five new common millet promising lines with a control (Pishahang) were cultivated in six locations (Karaj, Birjand, Gonbad,Yazd, Iranshahr and Sari) across two years in a randomized complete block design (RCBD) with three replications. The results of combined analysis for studied traits (number of tillers, number of leaves, days to flowering, height, fresh forage yield, dry forage yield and seed yield) showed that the cultivars and environments main effect and intraction between cultivars and environments were statistically significant. Total mean of fresh forage yield was 29.74 t/ha and the average yield of all the cultivars except KCM92/3 and KCM92/4 was lower than total mean. The results of the stability analysis by GGE biplot partitioned the testing environments into two mega-environments with KCM92/4 and Pishahang as superior genotypes. According to discriminate ability and representativeness, the E5 and E6 environments were perfect. Overall, the results of this study indicated that KCM92/4 is high-yielding genotyp and has good stability across the studied environments.