Height Growth of Half-Sib Families of Eucalyptus Camaldulensis Across Environments using Additive Main Effects and Multiplicative Interactions (AMMI) Analysis

Abstract

To determine the stability in yield and estimate the extend of genotype x environment interaction of half sib progenies of Eucalyptus camaldulensis across different locations, 48 half sib families and 2clones were evaluated in a randomized block design (RBD) with 4 replications at four locations viz.,Marakkanam, Thiyagathurgam, Karaikudi and Pulvayal after three years of planting during 2013. Additive main effects and multiplicative interactions (AMMI) analysis indicated that the height growth of half sib families were under the major effects of genotype x environment interactions. The first two principal component axes (PCA 1 and 2) were significant (P≤ 0.01) and cumulatively contributed to 84.31% of the total genotype by environment interaction. The biplot technique was used to identify appropriate half-sib families to specific locations. Results showed that the families, 74 and 118 were observed to be more stable as well as best performing family. The families, 36, 88, 74 and 118 showed low interaction with high growth performance and can be recommended for a wide range of environments. The families 30, 92 and 121 were although having high productivity, the interaction with environment was high. Hence, these families can be recommended for specific environments. Marakkanam and Thiyagathurgam were observed to be the favourable environment for most of the best performing families. According to stability Thiyagathurgam was found to be a more stable environment and can be used for breeding programs. Families 30 and 92 are unstable families, however they are specifically adapted to high yielding environment, Pulvayal.