Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments
While significant progress has been made by several international breeding institutions in improving maize nutritional quality, stacking of nutritional traits like zinc (Zn), quality protein, and provitamin A has not received much attention. In this study, 11 newly introduced Zn-enhanced inbred line...
| Autores principales: | , , , , |
|---|---|
| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Frontiers Media
2023
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/132639 |
| _version_ | 1855534466440626176 |
|---|---|
| author | Goredema-Matongera, Nakai Thokozile Ndhlela Biljon, Angeline van Casper Nyaradzai Kamutando Labuschagne, Maryke T. |
| author_browse | Biljon, Angeline van Casper Nyaradzai Kamutando Goredema-Matongera, Nakai Labuschagne, Maryke T. Thokozile Ndhlela |
| author_facet | Goredema-Matongera, Nakai Thokozile Ndhlela Biljon, Angeline van Casper Nyaradzai Kamutando Labuschagne, Maryke T. |
| author_sort | Goredema-Matongera, Nakai |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | While significant progress has been made by several international breeding institutions in improving maize nutritional quality, stacking of nutritional traits like zinc (Zn), quality protein, and provitamin A has not received much attention. In this study, 11 newly introduced Zn-enhanced inbred lines were inter-mated with seven testers from normal, provitamin A and quality protein maize (QPM) nutritional backgrounds in order to estimate the general combining ability (GCA) and specific combining ability (SCA) for grain yield (GY) and secondary traits under stress conditions [(combined heat and drought stress (HMDS) and managed low nitrogen (LN)] and non-stress conditions [(summer rainfed; OPT) and well-watered (irrigated winter; WW)] in Zimbabwe. Lines L6 and L7 had positive GCA effects for GY and secondary traits under OPT and LN conditions, and L8 and L9 were good general combiners for GY under HMDS conditions. Superior hybrids with high GY and desirable secondary traits were identified as L10/T7 and L9/T7 (Zn x normal), L2/T4, L4/T4, L3/T5 (Zn x provitamin A), and L8/T6 and L11/T3 (Zn x QPM), suggesting the possibility of developing Zn-enhanced hybrids with high yield potential using different nutritional backgrounds. Both additive and dominance gene effects were important in controlling most of the measured traits. This suggests that selecting for desirable traits during inbred line development followed by hybridization and testing of specific crosses under different management conditions could optimize the breeding strategy for stacked nutritionally-enhanced maize genotypes. |
| format | Journal Article |
| id | CGSpace132639 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace1326392025-12-08T10:29:22Z Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments Goredema-Matongera, Nakai Thokozile Ndhlela Biljon, Angeline van Casper Nyaradzai Kamutando Labuschagne, Maryke T. abiotic stress combining ability drought malnutrition maize nitrogen zinc While significant progress has been made by several international breeding institutions in improving maize nutritional quality, stacking of nutritional traits like zinc (Zn), quality protein, and provitamin A has not received much attention. In this study, 11 newly introduced Zn-enhanced inbred lines were inter-mated with seven testers from normal, provitamin A and quality protein maize (QPM) nutritional backgrounds in order to estimate the general combining ability (GCA) and specific combining ability (SCA) for grain yield (GY) and secondary traits under stress conditions [(combined heat and drought stress (HMDS) and managed low nitrogen (LN)] and non-stress conditions [(summer rainfed; OPT) and well-watered (irrigated winter; WW)] in Zimbabwe. Lines L6 and L7 had positive GCA effects for GY and secondary traits under OPT and LN conditions, and L8 and L9 were good general combiners for GY under HMDS conditions. Superior hybrids with high GY and desirable secondary traits were identified as L10/T7 and L9/T7 (Zn x normal), L2/T4, L4/T4, L3/T5 (Zn x provitamin A), and L8/T6 and L11/T3 (Zn x QPM), suggesting the possibility of developing Zn-enhanced hybrids with high yield potential using different nutritional backgrounds. Both additive and dominance gene effects were important in controlling most of the measured traits. This suggests that selecting for desirable traits during inbred line development followed by hybridization and testing of specific crosses under different management conditions could optimize the breeding strategy for stacked nutritionally-enhanced maize genotypes. 2023 2023-11-01T16:09:21Z 2023-11-01T16:09:21Z Journal Article https://hdl.handle.net/10568/132639 en Open Access application/pdf Frontiers Media Matongera, N., Ndhlela, T., van Biljon, A., Kamutando, C. N., & Labuschagne, M. (2023). Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments. Frontiers in Plant Science, 14. https://doi.org/10.3389/fpls.2023.1070302 |
| spellingShingle | abiotic stress combining ability drought malnutrition maize nitrogen zinc Goredema-Matongera, Nakai Thokozile Ndhlela Biljon, Angeline van Casper Nyaradzai Kamutando Labuschagne, Maryke T. Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title | Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title_full | Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title_fullStr | Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title_full_unstemmed | Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title_short | Combining ability and testcross performance of multi-nutrient maize under stress and non-stress environments |
| title_sort | combining ability and testcross performance of multi nutrient maize under stress and non stress environments |
| topic | abiotic stress combining ability drought malnutrition maize nitrogen zinc |
| url | https://hdl.handle.net/10568/132639 |
| work_keys_str_mv | AT goredemamatongeranakai combiningabilityandtestcrossperformanceofmultinutrientmaizeunderstressandnonstressenvironments AT thokozilendhlela combiningabilityandtestcrossperformanceofmultinutrientmaizeunderstressandnonstressenvironments AT biljonangelinevan combiningabilityandtestcrossperformanceofmultinutrientmaizeunderstressandnonstressenvironments AT caspernyaradzaikamutando combiningabilityandtestcrossperformanceofmultinutrientmaizeunderstressandnonstressenvironments AT labuschagnemaryket combiningabilityandtestcrossperformanceofmultinutrientmaizeunderstressandnonstressenvironments |