Analysis of grain size in bean (Phaseolus vulgaris L.) by linear and bilinear models

Abstract

Bean grain size, along with grain color and shape, is a constituent of bean's market quality. In order to be able to satisfy the broad market demand, cultivars with grain of all classes (from the smallest to largest) and top agronomic qualities must be developed. This paper analyzed 24 bean genotypes. They had different grain size in terms of their specific responses to growing conditions over three growing seasons. The two-way ANOVA was used to separate the main effects responsible for the formation of grain of a particular size. The genotype effects were 89.9%, the year effects 2.2%, and those of genotype x year interaction 7.9%. A large portion of interaction variability was attributable to two (AMMI) or tree (SREG) highly significant (by the Gollob F-test) principal components. Most of the genotypes exhibited high stability. The various types of interactions between individual genotypes and growing conditions in a given year are shown in two types of biplot graphs (GE and GGE).t to introduce organic agriculture programs in breeding institutions.