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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidade Estadual de Maringá
2021
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=303067924015 https://www.redalyc.org/journal/3030/303067924015/ https://www.redalyc.org/journal/3030/303067924015/html/ https://www.redalyc.org/journal/3030/303067924015/303067924015.epub https://www.redalyc.org/journal/3030/303067924015/movil |
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- Heterosis for the root distribution trait in common bean Sibila Grigolo Rita Carolina de Melo Ana Carolina da Costa Lara Fioreze Altamir Frederico Guidolin Jefferson Luís Meirelles Coimbra Agrociencias gene pools hybrid vigor genetic hypotheses Phaseolus vulgaris L Heterosis has been one of the most studied phenomena since genetic studies were conceived. Knowledge of this phenomenon for the root distribution trait in beans (Phaseolus vulgaris L.) can favour the development of genotypes that are more tolerant to abiotic stresses. This study aimed to verify the occurrence of heterosis for the root distribution trait in hybrid F1 populations of common bean derived from crosses within and between gene groups. Thirty-six populations (six parents and 30 hybrids) were evaluated under field conditions in the agricultural years 2016/17 and 2017/18. The root distribution was assessed with the adapted Bohm method. The genotypes responded similarly to environmental changes (absence of an interaction). However, the root distribution differed significantly between the agricultural years. Comparisons between the mean of hybrids from crosses within each gene pool and the mean of parents did not reveal heterosis. The comparisons between gene groups showed significant differences only between BRS Embaixador x IPR Uirapuru, CBS 14 x IPR Uirapuru, and BAF 53 x IPR Uirapuru and the mean of parents. The absence of heterosis in the root trait can be explained by the degree of kinship between the gene groups, as well as some epistatic interactions. 2021 artículo científico 1679-9275 https://www.redalyc.org/articulo.oa?id=303067924015 https://www.redalyc.org/journal/3030/303067924015/ https://www.redalyc.org/journal/3030/303067924015/html/ https://www.redalyc.org/journal/3030/303067924015/303067924015.epub https://www.redalyc.org/journal/3030/303067924015/movil 10.4025/actasciagron.v43i1.46712 en http://www.redalyc.org/revista.oa?id=3030 Acta Scientiarum. Agronomy application/pdf Universidade Estadual de Maringá Acta Scientiarum. Agronomy (Brasil) Vol.43