Heritability, combining ability and inheritance of storage root dry matter in yam beans
Storage root dry matter content (RDM) is central to the improvement of consumer and industrial attributes of root crops. Yam bean (Pachyrhizus species) is a legume root crop newly introduced in Uganda, but its adoption may be constrained by low RDM. The objective of this study was to investigate the...
| Autores principales: | , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Acceso en línea: | https://hdl.handle.net/10568/90589 |
| _version_ | 1855538217613262848 |
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| author | Agaba, R. Tukamuhabwe, Phineas Rubaihayo, P.R. Mwanga, Robert O.M. Ssenyonjo, A. Ndirigwe, J. Tumwegamire, Silver Grüneberg, W.J. |
| author_browse | Agaba, R. Grüneberg, W.J. Mwanga, Robert O.M. Ndirigwe, J. Rubaihayo, P.R. Ssenyonjo, A. Tukamuhabwe, Phineas Tumwegamire, Silver |
| author_facet | Agaba, R. Tukamuhabwe, Phineas Rubaihayo, P.R. Mwanga, Robert O.M. Ssenyonjo, A. Ndirigwe, J. Tumwegamire, Silver Grüneberg, W.J. |
| author_sort | Agaba, R. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Storage root dry matter content (RDM) is central to the improvement of consumer and industrial attributes of root crops. Yam bean (Pachyrhizus species) is a legume root crop newly introduced in Uganda, but its adoption may be constrained by low RDM. The objective of this study was to investigate the magnitude of variance for general combining ability (GCA) and specific combining ability (SCA) effects, heritability estimates and inheritance of RDM in yam beans. Progenies of sixteen crosses, generated using the North Carolina (NCII) mating scheme, were evaluated in F1 and F2 field experiments, with three replications at the National Crops Resources Research Institute (NaCRRI), Namulonge in Central Uganda, during the first cropping seasons of April, 2013 and 2014, respectively. Significant (p<0.001) mean squares for general combining ability (GCA), and specific combining ability (SCA) were observed in F1 and F2 generations, demonstrating additive and non-additive genetic inheritance of RDM. High Baker’s ratio in F1 (0.76) and F2 (0.78), and large σ2GCA/σ2SCA (3.13) indicate predominance of additive gene effects. Narrow sense heritability was high in both F1 (0.74) and F2 (0.75), implying that RDM can be improved in yam beans through selection. The results provide a basis for selection of suitable parents for hybridisation and breeding programmes to develop high dry matter yam bean varieties in Uganda. |
| format | Journal Article |
| id | CGSpace90589 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | CGSpace905892025-11-29T05:22:22Z Heritability, combining ability and inheritance of storage root dry matter in yam beans Agaba, R. Tukamuhabwe, Phineas Rubaihayo, P.R. Mwanga, Robert O.M. Ssenyonjo, A. Ndirigwe, J. Tumwegamire, Silver Grüneberg, W.J. pachyrhizus erosus dry matter content heritability Storage root dry matter content (RDM) is central to the improvement of consumer and industrial attributes of root crops. Yam bean (Pachyrhizus species) is a legume root crop newly introduced in Uganda, but its adoption may be constrained by low RDM. The objective of this study was to investigate the magnitude of variance for general combining ability (GCA) and specific combining ability (SCA) effects, heritability estimates and inheritance of RDM in yam beans. Progenies of sixteen crosses, generated using the North Carolina (NCII) mating scheme, were evaluated in F1 and F2 field experiments, with three replications at the National Crops Resources Research Institute (NaCRRI), Namulonge in Central Uganda, during the first cropping seasons of April, 2013 and 2014, respectively. Significant (p<0.001) mean squares for general combining ability (GCA), and specific combining ability (SCA) were observed in F1 and F2 generations, demonstrating additive and non-additive genetic inheritance of RDM. High Baker’s ratio in F1 (0.76) and F2 (0.78), and large σ2GCA/σ2SCA (3.13) indicate predominance of additive gene effects. Narrow sense heritability was high in both F1 (0.74) and F2 (0.75), implying that RDM can be improved in yam beans through selection. The results provide a basis for selection of suitable parents for hybridisation and breeding programmes to develop high dry matter yam bean varieties in Uganda. 2017-02 2018-01-26T02:45:59Z 2018-01-26T02:45:59Z Journal Article https://hdl.handle.net/10568/90589 en Open Access Agaba, R.; Tukamuhabwa, P.; Rubaihayo, P.; Mwanga, R.O.M.; Ssenyonjo, A.; Ndirigwe, J.; Tumwegamire, S.; Gruneberg, W. 2017. Heritability, combining ability and inheritance of storage root dry matter in yam beans. African Crop Science Journal. ISSN 1021-9730. 25:1. 83-95. |
| spellingShingle | pachyrhizus erosus dry matter content heritability Agaba, R. Tukamuhabwe, Phineas Rubaihayo, P.R. Mwanga, Robert O.M. Ssenyonjo, A. Ndirigwe, J. Tumwegamire, Silver Grüneberg, W.J. Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title | Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title_full | Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title_fullStr | Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title_full_unstemmed | Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title_short | Heritability, combining ability and inheritance of storage root dry matter in yam beans |
| title_sort | heritability combining ability and inheritance of storage root dry matter in yam beans |
| topic | pachyrhizus erosus dry matter content heritability |
| url | https://hdl.handle.net/10568/90589 |
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