Stability analysis of promising sugarcane genotypes for cane and sugar yields using the AMMI model and GGE biplot

The sugarcane clone G 2008019 is a general cross progeny of CoV 92102 that outyielded the checks in initial breeding trials. To assess its stability and yield potential under saline stress, multi-environment trials comprising 20 environments were conducted from 2022 to 2024. It produced the highest mean cane yield of 123.41 t/ha with a commercial cane sugar percentage of 13.06, representing a 27.46%, 28.89% and 31.79% increase over the checks Co 86032 (96.82 t/ha), CoG 94077 (93.64 t/ha) and CoG 95076 (95.75 t/ha) respectively. Further, it exhibited a 29.35%, 35.09% and 34.16% increase in sugar yield over the checks, respectively. From the AMMI (additive main effects and multiplicative interactions) and GGE (genotype × genotype interaction with environment) biplots, the performance and stability of the test genotypes were ascertained. The ANOVA analysis showcased a significant contribution of genotypes to total variation followed by the genotype × environment interaction and the environment itself. The yield potential and the stability of G 2008019 were confirmed through minimal ASV values and higher values for cane yield and juice-based quality traits. The biplots of AMMI I, AMMI II and GGE confirmed the constancy of G 2008019. Additionally, the sugarcane clone G 2008019 possessed good jaggery qualities, including 65.36% juice recovery, 91.84% juice purity, 11.32% jaggery recovery and 15.21 t/ha jaggery yield. The mean fibre content of the clone was 13.25%. These combined results indicate the suitability of clone G 2008019 for further utilization in the breeding cycle.