Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.)
Background. This work aimed at using Hayman’s methodology to study the inheritance of some quantitative traits, such as the number of pods per plant, pod length, mean pod weight, and yield per plant in 15 diallel hybrids of six green bean cultivars.Materials and methods. The research was carried out...
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N.I. Vavilov All-Russian Institute of Plant Genetic Resources
2023-10-01
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| Series: | Труды по прикладной ботанике, генетике и селекции |
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| Online Access: | https://elpub.vir.nw.ru/jour/article/view/1657 |
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| author | M. Contreras-Rojas D. G.G. Guzmán S. A. Salazar Mercado |
| author_facet | M. Contreras-Rojas D. G.G. Guzmán S. A. Salazar Mercado |
| author_sort | M. Contreras-Rojas |
| collection | DOAJ |
| description | Background. This work aimed at using Hayman’s methodology to study the inheritance of some quantitative traits, such as the number of pods per plant, pod length, mean pod weight, and yield per plant in 15 diallel hybrids of six green bean cultivars.Materials and methods. The research was carried out at the Experimental Center of Universidad Nacional de Colombia – Sede Palmira (CEUNP). A randomized complete block experimental design with four replications was used.Results. For most of the traits, except yield per plant, the additive-dominant model was adequate. Non-additive effects with overdominance controlled the number of pods per plant, pod length, and mean pod weight. Most of the characters presented an unequal proportion of positive and negative genes in the loci (H1 < H2). The asymmetric distribution of genes in the parents (H2/4H1) was below the maximum value (0.25), except for the character “number of pods per plant”. The KD/KR ratio confirmed for most of the traits that there was an excess of recessive alleles over dominant alleles. Dominance effects (h2) for most characters suggested that the substantial contribution of dominance was not due to heterogeneity of loci in these characters. The narrow-sense heritability was moderate to low. The correlation coefficient r (Yr; Wr + Vr) indicated that dominant genes were responsible for the increased number of pods per plant and recessive genes for increased pod length and mean pod weight.Conclusions. Conventional breeding methods like pedigree selection could be employed to improve the characters “pod length” and “mean pod weight”, and for the number of pods per plant, management of segregating populations should employ the single-seeded descent method. |
| format | Article |
| id | doaj-art-ab77b65736bd440e936cf40fc1180bb0 |
| institution | Kabale University |
| issn | 2227-8834 2619-0982 |
| language | English |
| publishDate | 2023-10-01 |
| publisher | N.I. Vavilov All-Russian Institute of Plant Genetic Resources |
| record_format | Article |
| series | Труды по прикладной ботанике, генетике и селекции |
| spelling | doaj-art-ab77b65736bd440e936cf40fc1180bb02025-02-03T08:31:16ZengN.I. Vavilov All-Russian Institute of Plant Genetic ResourcesТруды по прикладной ботанике, генетике и селекции2227-88342619-09822023-10-01184311612410.30901/2227-8834-2023-3-116-124729Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.)M. Contreras-Rojas0D. G.G. Guzmán1S. A. Salazar Mercado2Universidad Francisco de Paula SantanderUniversidad Nacional de AgriculturaUniversidad Francisco de Paula SantanderBackground. This work aimed at using Hayman’s methodology to study the inheritance of some quantitative traits, such as the number of pods per plant, pod length, mean pod weight, and yield per plant in 15 diallel hybrids of six green bean cultivars.Materials and methods. The research was carried out at the Experimental Center of Universidad Nacional de Colombia – Sede Palmira (CEUNP). A randomized complete block experimental design with four replications was used.Results. For most of the traits, except yield per plant, the additive-dominant model was adequate. Non-additive effects with overdominance controlled the number of pods per plant, pod length, and mean pod weight. Most of the characters presented an unequal proportion of positive and negative genes in the loci (H1 < H2). The asymmetric distribution of genes in the parents (H2/4H1) was below the maximum value (0.25), except for the character “number of pods per plant”. The KD/KR ratio confirmed for most of the traits that there was an excess of recessive alleles over dominant alleles. Dominance effects (h2) for most characters suggested that the substantial contribution of dominance was not due to heterogeneity of loci in these characters. The narrow-sense heritability was moderate to low. The correlation coefficient r (Yr; Wr + Vr) indicated that dominant genes were responsible for the increased number of pods per plant and recessive genes for increased pod length and mean pod weight.Conclusions. Conventional breeding methods like pedigree selection could be employed to improve the characters “pod length” and “mean pod weight”, and for the number of pods per plant, management of segregating populations should employ the single-seeded descent method.https://elpub.vir.nw.ru/jour/article/view/1657diallel analysisadditive effectsdominant effectsepistasisgenetic parameters |
| spellingShingle | M. Contreras-Rojas D. G.G. Guzmán S. A. Salazar Mercado Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) Труды по прикладной ботанике, генетике и селекции diallel analysis additive effects dominant effects epistasis genetic parameters |
| title | Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) |
| title_full | Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) |
| title_fullStr | Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) |
| title_full_unstemmed | Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) |
| title_short | Genetic control of yield components in green beans (<i>Phaseolus vulgaris</i> L.) |
| title_sort | genetic control of yield components in green beans i phaseolus vulgaris i l |
| topic | diallel analysis additive effects dominant effects epistasis genetic parameters |
| url | https://elpub.vir.nw.ru/jour/article/view/1657 |
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