Abstract

CONTRERAS-ROJAS, Mayra; VALLEJO-CABRERA, Franco Alirio  and  ORTIZ-GRISALES, Sanín. Combining ability of traits related to snap beans production (Phaseolus vulgaris L.). rev.udcaactual.divulg.cient. [online]. 2023, vol.26, n.1, 2217.  Epub June 26, 2023. ISSN 0123-4226.  https://doi.org/10.31910/rudca.v26.n1.2023.2217.

Green bean varieties grown in Colombia have low production potential, therefore it is necessary to carry out plant breeding programs, which execution depends on the knowledge of the combinatorial ability of the available cultivars. To evaluate the predominant gene action in economically important traits 15 direct hybrids and six parents were evaluated. General combining ability (GCA) and specific combining ability (SCA) were estimated with Griffing's Method 2 model 1, which considers parents and their direct crosses. The characters: number of pods and yield per plant, average weight and pod length were measured. The results indicated additive genetic effects for pod length. In contrast, pod number and yield per plant were influenced by non-additive genetic effects, while average pod weight was controlled by both additive and non-additive genetic effects. Parents 1 and 6 showed higher positive effects of HCG for average pod weight and pod length, while parents 5 and 6 for pod yield per plant and parents 4 and 5 for number of pods per plant. The highest ECGH estimation for all traits was found in the 1x2 hybrid, being the most suitable for improving bean production.

Keywords : Diallel analysis; Gene action; Genetic variation; Hybridization; Vegetable breeding.

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