Ammi Analysis and its Application to Sugarcane Regional Trials in Venezuela

摘要

The problem of genotype by environment interaction (G x E) is that often complicates the interpretation of trials in multiple locations, making it difficult to select genotypes adapted to different environments. AMMI model was adopted to analyze ten sugarcane genotypes in ten Venezuelan environments evaluated through two years of cultivation. The objectives of this study were to identify stable and adaptable genotypes in different locations and determine the magnitude of G x E interaction. The analysis of variance showed that 72% of the total sum of squares was attributed to environmental effect, indicating that the sites were diverse. The first two principal component axes were significant, and both sums contributed to 61.09% to the total of G x E interaction. The V77-12 genotype exhibited high yield and wide adaptability to different environments. However, the CP74-2005, CP72-2086, PR61-632, PR980, and V78-2 genotypes showed high yield but with specific adaptations through locations. The application of AMMI model facilitated the visual comparison and identification of superior genotypes for each set of environments.