COMPUTATIONAL ANALYSIS OF TIIE GENOTYPE-ENVIRONMENT INTERACTION WITH THE AMMI MODEL

Abstract

The multiplicative model spread over the breeder's world as the additive main effect and multiplicative interaction method (AMMI) by Gauch is one of the approaches most commonly used to study the genotype- environment interaction. This approach has proved to be useful, but in México, plant breeders do not know it or lack programs to use it. In this paper the AMMI model is applied with the Statgraphics computational package. A computational program in SAS (Statistical Analysis System) is provided as well, and matrix operations are described in order to apply it. This analysis is exemplified with cotton (Gossypium hirsutum L.) research data.