GENOTYPE x ENVIRONMENT INTERACTION ANALYSIS OF COMMON BEAN CULTIVARS IN SANTA CATARINA

Abstract

To verify the genotype x environment interactions, a study was undertaken using the yields from the bean varieties and breeding times state Trials, carried out during five years in seven environments. throughout the state of santa Catarina. Statistical analysis were performed using the main recommended varieties which participated in ali trials from 1991 to 1995, taking the grain yield as an indicator of adaptability. The trials were planted with four replications in a randomized complete block design, with four-row plots, 5 m long. The significance of the genotype x environment interaction indicates that the varieties/lines did not have the same behavior across the environments. The value of the estimated environment x genotype interaction variance (a 2c,$) was higher than year x genotype interaction (a 2cxyw), indicating that the best strategy is to use a higher number of locais rather than years to evaluate bean genotypes. The cultivars with better yields along this period were Macanudo', `Barriga Verde' and `Carioca'.