Genotype x environment interaction, stability analysis for yield and quality traits in turmeric (Curcuma longa L.)

Genotype x environment interaction and stability were analyzed through Eberhart and Russell model among seventeen accessions/germplasms of turmeric (Curcuma longa L.) during three environments/years. For rhizome yield the mean performance over three environments showed that yield ranged from 241.41 q/ha (CIMCH14127) to 579.67 q/ha (CIMCH14229). Six genotypes namely CIMCH14107, CIMCH14171, CIMCH14165, CIMCH14130, CIMCH14208 and CIMCH14229 had significantly higher mean for rhizome yield as compared to the general mean. Among seventeen genotypes, five genotypes had more than 1 regression coefficient, while eight genotypes had less than 1 regression coefficient and four genotypes showed bi=1. For CIMCH14101, CIMCH14144, CIMCH14159, CIMCH14190, CIMCH14152, CIMCH14123 and CIMCH14164 S2di was significant. The stability parameters for rhizome yield revealed that CIMCH14171 and CIMCH14229 were stable for all environments. Three genotypes viz., CIMCH14107, CIMCH14130 and CIMCH14208 genotypes were suitable for unfavorable environments having mean values, bi