YIELD STABILITY AND REACTION TO DISEASES OF BEAN VARIETIES IN CENTRAL CHIAPAS

Abstract

In the central region of the State of Chiapas, Mexico, dry bean (Phaseolus vulgaris L.) yield is limíted by several factors, among which the Bean Golden Mosaic Virus (BGMV) is one of the most impor­tant. Therefore, several genotypes were introduced for selectíng towards high yield potential and dís­ease resistance. During 1984 and 1985, a yield trial with 24 dry bean genotypes was planted in 11 loca­tíons of the region. The results of the combined analysis of variance, indicated significant differ­ences for environments, genotypes and its interact­ion. The estimates of the estability parameters indicated that 13 genotypes showed stability and con sistency in all the environments; 10 cultivars had - stability in the 11 locations but were inconsistent, and only one cultivar showed a consistent good yield in bad-environments. Among the 13 genotypes with stability and consistency, D-159, 0-157, D-154 and Negro Huasteco-81 showed resistance to BGMV, and they were recommended for commercial planting in this region.