GENETIC STABILITY ANALYSIS OF SOME NEW SNAP BEAN GENOTYPES

Abstract

In this study, the field experiment was carried out during the growing seasons of 2015/2016 and 2016/2017, at Barrage Horticulture Research Station (BHRS), Qalyubia Governorate, Egypt, in order to investigate the stability analysis of some new snap bean (Phaseolus vulgaris L.) genotypes. Randomized complete block design with three replications was used. Four dates ,i.e. : 1st September, 1st October, 15th February and 15th March. Twenty one promising snap bean genotypes were obtained from a previous breeding program of Horticulture Research Institute, ARC and four commercial cultivars namely Bronco, Paulista, Samantha and Xera were used in the experiment. The results of this experiment can be summarized as follows: 1. Performance of genotypes under different environments: Vegetative growth and flowering: • Plant length was significantly affected by years, sowing dates, and snap bean genotypes and their interactions. • As for number of leaves /plant, overall mean for number of leaves/plant of snap bean genotypes was (8.51) and the highest genotype was G7 (10.15) and the lowest genotype was G12 (5.32). • Leaf area was significantly affected by years, sowing dates, genotypes and their interactions. These results indicated that wide diversity existed among all snap bean genotypes concerning the performance for leaf area as affected by various investigated factors. • No significant values between sowing dates on fresh weight were observed in the first year but was significant values were corded in the second year and the best plant sowing date was mid of March.