Stability analysis for identification of stable genotypes of sugarcane (Saccharum spp.) through AMMI model

Genotype × Environment interaction for cane yield, commercial cane sugar yield (CCS yield) and sucrose percentage in sugarcane (Saccharum spp.) was studied across three environments during 2017-18 and 2018-19 crop seasons to identify stable variety. To assess performance of 22 genotypes, additive main effect and multiplicative interaction (AMMI) model was used. The G×E interactions of sugarcane genotypes across environments were analysed to assess their stability for cane yield, CCS yield and sucrose percentage. Analysis of variance indicated that genotype, environment and genotype × environment interactions were highly significant. The AMMI analysis of variance across three environments showed high total variation for cane yield (38.56%), CCS yield (42.09%) and sucrose (35.87%). This revealed that environments were diverse and significantly influenced the stability of the genotypes. Based on mean performance across the environments and stability, the genotypes viz., Co 11015, Co 09004, Co 0240, Co 13014, and Co 14016 were found superior for both cane yield and CCS yield. For sucrose percentage, the genotypes, namely, Co 15021, Co 11015, Co 15007, Co 13001 and Co 16001 were found superior and stable across the environments. Number of millable cane, single cane weight and cane diameter were highly correlated with cane yield and therefore, needs special importance during selection for improvement of cane yield and CCS yield.