Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines
Maize (Zea mays L.) production in sub-Saharan Africa can be improved by using hybrids with genetic resistance to maize lethal necrosis (MLN). This study aimed to assess the general (GCA) and specific combining ability (SCA), reciprocal effects, and quantitative genetic basis of MLN resistance and ag...
| Autores principales: | , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Frontiers Media
2025
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/172550 |
| _version_ | 1855538975642484736 |
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| author | Kavai, Hilda M. Makumbi, Dan Nzuve, Felister M. Woyengo, Vincent W. Suresh, L. M. Muiru, William M. Gowda, Manje Prasanna, Boddupalli |
| author_browse | Gowda, Manje Kavai, Hilda M. Makumbi, Dan Muiru, William M. Nzuve, Felister M. Prasanna, Boddupalli Suresh, L. M. Woyengo, Vincent W. |
| author_facet | Kavai, Hilda M. Makumbi, Dan Nzuve, Felister M. Woyengo, Vincent W. Suresh, L. M. Muiru, William M. Gowda, Manje Prasanna, Boddupalli |
| author_sort | Kavai, Hilda M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Maize (Zea mays L.) production in sub-Saharan Africa can be improved by using hybrids with genetic resistance to maize lethal necrosis (MLN). This study aimed to assess the general (GCA) and specific combining ability (SCA), reciprocal effects, and quantitative genetic basis of MLN resistance and agronomic traits in tropical maize inbred lines. A total of 182 hybrids from a 14-parent diallel, along with their parents, were evaluated under artificial MLN inoculation and rainfed conditions for 3 years in Kenya. Disease ratings at four time points, grain yield (GY), and other agronomic traits were analyzed using Griffing’s Method 3 and Hayman’s diallel models. Significant (P < 0.001) GCA and SCA mean squares were observed for all traits under disease conditions and most traits under rainfed conditions, highlighting the importance of both additive and non-additive genetic effects. However, additive gene action predominated for all traits. Narrow-sense heritability estimates for MLN resistance (h2 = 0.52–0.56) indicated a strong additive genetic component. Reciprocal effects were not significant for MLN resistance, suggesting minimal maternal or cytoplasmic inheritance. Four inbred lines showed significant negative GCA effects for MLN resistance and positive GCA effects for GY under artificial MLN inoculation. Inbred lines CKL181281 and CKL182037 (GCA effects for MLN4 = -0.45 and -0.24, respectively) contained the most recessive alleles for MLN resistance. The minimum number of groups of genes involved in MLN resistance was estimated to be three. Breeding strategies that emphasize GCA could effectively be used to improve MLN resistance in this germplasm. |
| format | Journal Article |
| id | CGSpace172550 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace1725502025-12-08T10:29:22Z Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines Kavai, Hilda M. Makumbi, Dan Nzuve, Felister M. Woyengo, Vincent W. Suresh, L. M. Muiru, William M. Gowda, Manje Prasanna, Boddupalli combining ability disease resistance genetic inheritance necrosis maize inbred lines grain yield Maize (Zea mays L.) production in sub-Saharan Africa can be improved by using hybrids with genetic resistance to maize lethal necrosis (MLN). This study aimed to assess the general (GCA) and specific combining ability (SCA), reciprocal effects, and quantitative genetic basis of MLN resistance and agronomic traits in tropical maize inbred lines. A total of 182 hybrids from a 14-parent diallel, along with their parents, were evaluated under artificial MLN inoculation and rainfed conditions for 3 years in Kenya. Disease ratings at four time points, grain yield (GY), and other agronomic traits were analyzed using Griffing’s Method 3 and Hayman’s diallel models. Significant (P < 0.001) GCA and SCA mean squares were observed for all traits under disease conditions and most traits under rainfed conditions, highlighting the importance of both additive and non-additive genetic effects. However, additive gene action predominated for all traits. Narrow-sense heritability estimates for MLN resistance (h2 = 0.52–0.56) indicated a strong additive genetic component. Reciprocal effects were not significant for MLN resistance, suggesting minimal maternal or cytoplasmic inheritance. Four inbred lines showed significant negative GCA effects for MLN resistance and positive GCA effects for GY under artificial MLN inoculation. Inbred lines CKL181281 and CKL182037 (GCA effects for MLN4 = -0.45 and -0.24, respectively) contained the most recessive alleles for MLN resistance. The minimum number of groups of genes involved in MLN resistance was estimated to be three. Breeding strategies that emphasize GCA could effectively be used to improve MLN resistance in this germplasm. 2025-01-09 2025-01-30T16:28:53Z 2025-01-30T16:28:53Z Journal Article https://hdl.handle.net/10568/172550 en Open Access application/pdf Frontiers Media Kavai, H. M., Makumbi, D., Nzuve, F. M., Woyengo, V. W., Suresh, L. M., Muiru, W. M., Gowda, M., & Prasanna, B. M. (2025). Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines. Frontiers in Plant Science, 15. https://doi.org/10.3389/fpls.2024.1506139 |
| spellingShingle | combining ability disease resistance genetic inheritance necrosis maize inbred lines grain yield Kavai, Hilda M. Makumbi, Dan Nzuve, Felister M. Woyengo, Vincent W. Suresh, L. M. Muiru, William M. Gowda, Manje Prasanna, Boddupalli Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title | Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title_full | Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title_fullStr | Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title_full_unstemmed | Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title_short | Inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| title_sort | inheritance of resistance to maize lethal necrosis in tropical maize inbred lines |
| topic | combining ability disease resistance genetic inheritance necrosis maize inbred lines grain yield |
| url | https://hdl.handle.net/10568/172550 |
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