Genotypes x environment interactions and stability analysis of sugarcane clones (Saccharum spp.) by AMMI model in sub-tropical regions of India

Abstract

Fifteen elite sugarcane clones along with five zonal standard varieties were evaluated under four production environments in the sub-tropical climate. AMMI model was employed to assess the magnitude of Genotype x environment (GE) interaction and the stability of sugarcane clones across environments. AMMI analysis revealed the significant difference among tested clones and environments. It has shown 43.17% of the variation in cane yield which could be attributed to environmental effects. The genotypic effects accounted for 45.76% variation with 11.06% of GEI effects. The early maturing high sugar varieties, Co 0238 and Co 0118 gave 89.27 t/ha and 80.11 t/ ha cane yield, respectively and thus considered as widely adapted genotypes across the environments and can be recommended for commercial cultivation in sub-tropical region. Co 98014 and Co 05011 exhibited better adaptability in ratoon trials and appeared to be suitable for multiple ratoon. Considering IPCA score, CoS 767 was most stable standard (check) across the environments. With regards to the environments, E2 (spring season plant crop) and E1 (autumn season plant crop) placed on the upper right half of perpendicular axis of AMMI biplot due to the positive interactions and hence both E2 and E1 are the favourable environments for obtaining higher cane yield.