DEVELOPING NEW DRY BEAN (Phaseolus vulgaris L.) LINES THROUGH PEDIGREE SELECTION

doi:10.12816/ejpb.2019.256691

DEVELOPING NEW DRY BEAN (Phaseolus vulgaris L.) LINES THROUGH PEDIGREE SELECTION

Document Type : Original research

10.12816/ejpb.2019.256691

Abstract

This investigation was conducted at Sids Horticultural Research Station, Beni-Suef Governorate, Horticultural Research Institute, Agricultural Research Center, Egypt, during the period from 2015 to 2019 to study the genetic variability and heritability for some economic characters and develop some new promising dry bean lines by pedigree selection. Four bean cultivars (Phaseolus vulgaris L.) were used in this study, namely, Bronco, Giza 6, Nebraska and Diacol. These cultivars were planted for hybridization between them. Three crosses were made at flowering stage, namely Bronco x Giza 6 (Population1), Bronco x Nebraska (Population 2) and Bronco x Diacol (Population 3). Segregating generations were planted, and selection was practiced until they reached the seventh generation. Nine new F6 and F7 lines of dry bean selected were developed from the three hybrid populations using pedigree selection. The yield and its component traits i.e. plant height, number of branches/plant, number of days to flowering, dry pod length, number of dry pods/plant, number of dry seeds/pod, 100-dry seeds weight and seed yield traits were studied. Results showed highly significant differences among the families for all studied traits in all segregating generations for all hybrid populations. The families BG-7-286 and BN-8-123 possessed the highest seed yield followed by the families BG-52-367 and BG-94-478. The highest GCV and PCV was observed for number of seeds/pod, number of pods/plant, seed yield, number of days to flowering and 100- seed weight for all segregating generations in all hybrid populations. The highest estimates of broad sense heritability (BSH) were recorded by number of branches/plant, days to flowering and plant height in a descending order in all segregating generations for all hybrid populations.

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