GGE Biplot Analysis for Cane Yield and Sugar Yield in Advanced clones of Sugarcane (Saccharum sp. complex)

Abstract

The present investigation was taken up to study the G×E interaction and stability analysis by GGE biplot method in fourteen sugarcane clones during 2020-21 and 2021-22 at four different locations namely Pantnagar, Kashipur, Dhanauri (Haridwar) and Dhakrani (Dehradun) for CY and SY at the 10-month and 12-month stages. The combined ANOVA revealed significant differences among the clones, environments and their interactions for CY and SY at both stages, revealed presence of sufficient variability in the materials being studied. To analyze the stability of genotype and G×E interaction studies, the GGE biplot method was employed. The first two PCs explained 77.94% for CY (PC1 = 63.01%, PC2 = 14.93%), 74.4% for SY at the 10-month stage (PC1 = 55.64%, PC2 = 18.76%), and 81.01% for SY at 12-month stage (PC1 = 63.64%, PC2 = 17.37%) of the total variation of the GGE model. GGE biplot "which-won-where" revealed genotypes G2, G4, G6, and G7 were found to be ideal genotypes for CY as well as SY at the 10-month and 12-month stages. Based on the "discrimination vs representativeness" GGE biplot, E4 and E2 were identified as ideal test environments for selecting widely and specifically adapted genotypes, respectively, for CY and SY at the 10-month as well as 12-month stages. The clones showed crossover G×E interaction for the SY at the 10-month stage. The "mean vs stability" GGE biplot revealed that G6 had high mean and stability for CY and SY at both stages.