Analysis of Genotype-Environment Interactions Based on the Method of Path Coefficient Analysis

Abstract

A method of investigating genotype-environment interactions of field crops is presented. Based on the concept that yield components are determined sequentially at different stages in the ontology of plants and the hypothesis that the environmental resources can be separated into independent groups with each contributing to the development of a component trait, a causal relationship between environmental resources, component traits and yield is established (Fig. 1). The GE interaction effect is then represented by three multiplicative terms which are composed of three genotypic and three environmental components. These components are estimated using the method of path coefficient analysis based on the postulated causal relationship. Data of marketable yield and yield components of seven potato cultivars collected from two series of trials are examined by the proposed method.

Path analysis of genotype × environment interaction in wheat-barley disomic addition lines

“…The three genotypic components each represent the efficiency with which a genotype utilizes a standard deviation unit input in one of the three environmental components during the succeeding stages of plant development for the formation of final yield (Tai, 1975;1979;Tai et al, 1994).…”

“…X→Y→Z→W. This sequential relationship between yield and yield components was developed into a working model for the investigation of crop yields by Tai (1975), and has been shown to provide a powerful tool for studying G × E interactions (Tai, 1979;Lynch and Tai, 1989;Tai et al, 1994;Fagam et al, 2006;Hui et al, 2008;Das and Taliaferro, 2009;Yasin and Singh, 2010).…”

The association between potato tuber yield and the components of yield in irrigated and dryland environments in the prairies

“…Groupings of the locations were also examined using principal component analysis (Seal 1964 (Tai 1975 (Table 2b).…”

Path analysis of genotype × environment interactions in rainfed durum wheat

“…Several researchers (Ehdaei et al, 1999;Grafius, 1969;Lynch & Tai, 1989;Tai, 1975;Tai et al, 1994;Thomas et al, 1971) presented the concept of a sequential development process of yield components. Tai (1971) developed a statistical model based on the path analysis approach (Wright, 1934), which has been used successfully to study GE interaction of yield and its components for a set of genotypes evaluated in a range of environments.…”

“…The main objectives were to (i) study GE interaction for grain yield and its components in durum wheat under diversified rainfed environments and (ii) identify superior genotypes to environmental constraints in the highland OPEN ACCESS To study the relationship between yield and the components of yield, the model proposed by Tai (1975) was used. The causal relationship between the grain yield and its four components is diagrammed in Figure 1.…”