Phenotypic Stability Analysis in Foxtail Millet for Quality Characters

摘要

Twenty italian millet genotypes were evaluated for three quality characters over 16 environments (8 sowing dates with 2 fertility levels).The analysis of variance of Eberhart and Russell indicated that G X E interaction was significant for all 3 characters under study and that genotypes differed significantly. Among the AMMI component first four IPCA axis were explained most of the portion of G X E interaction than other IPCA axis for the three characters under study. The ANOVA indicated non-significant G X E interaction for carotene content and ANOVA of (Eberhart and Russell, 1966) indicated non-significant G X E (linear) interaction for calcium content, when tested against pooled deviation. As per AMMI analysis the IPCA_1 significantly contributedto protein content, calcium content and carotene content while IPCA_2 contributed significantly to G X E interaction for protein content, calcium content and carotene content. This brings out clearly the advantage of AMMI ANOVA in bringing out G X E interaction through IPCA_1 which gets combined with error in the other two ANOVA and points out the utility of AMMI models in studying the significant GxE interaction and identifying stable genotypes for characters which so undetected in the earlier analysis. According to AMMI analyses the genotypes like GS 444 and GS 480 (for protein content); most of ihe genotypes (for calcium content); GS 445, GS 450 and PRD (for carotene content) are more stable because they are having IPCA score near zero that is theyshow less interaction with environments. According to Eberhart and Russell the genotypes like GS 488 and KDR (for protein content); GS 489, GS 463 and GS 479 (for calcium content) and GS 462 and GS 479 (carotene content) showed desirable performance.