Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production
Extra-early maize (Zea mays L) tolerant to low-N and drought could stabilize yields in sub-Saharan Africa. Studies were conducted under drought and low-N conditions in Nigeria for three years to determine the potential of 90 extra-early inbreds for hybrid production and evaluate the performance of 3...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2011
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| Acceso en línea: | https://hdl.handle.net/10568/34908 |
| _version_ | 1855515860371767296 |
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| author | Badu-Apraku, Baffour Fakorede, M.A.B. Oyekunle M Akinwale, R. |
| author_browse | Akinwale, R. Badu-Apraku, Baffour Fakorede, M.A.B. Oyekunle M |
| author_facet | Badu-Apraku, Baffour Fakorede, M.A.B. Oyekunle M Akinwale, R. |
| author_sort | Badu-Apraku, Baffour |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Extra-early maize (Zea mays L) tolerant to low-N and drought could stabilize yields in sub-Saharan Africa. Studies were conducted under drought and low-N conditions in Nigeria for three years to determine the potential of 90 extra-early inbreds for hybrid production and evaluate the performance of 36 hybrids derived from the inbreds under drought at flowering and grain-filling periods and well-watered conditions. Results showed significant ge¬notypic mean squares for grain yield and most other traits of the inbreds under drought and/or low-N conditions. TZEEI6, TZEEI4, TZEEI36, and TZEEI38 were identified as ideal inbreds under drought. Under low-N, TZEEI19, TZEEI96 and TZEEI45 were top ranking with TZEEI19 as the ideal inbred. TZEEI19, TZEEI29, TZEEI56, TZEEI38, and TZEEI79 were tolerant to both stresses. Eighteen of the 36 hybrids produced above-average yields across environments with four hybrids identified as very stable. TZEEI29 x TZEEI21 was the closest to the ideal geno¬type because it combines large mean performance with high yield stability. Hybrid yield under drought had large positive correlation with grain yield under well-watered environments. Selection for inbred traits such as days to silking and anthesis-silking interval under drought predicted fairly accurately hybrid yield under well-watered environments. It was concluded that extra-early inbreds and hybrids are not only drought escaping but also possess drought and low-N tolerant genes. |
| format | Journal Article |
| id | CGSpace34908 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| record_format | dspace |
| spelling | CGSpace349082023-08-03T08:10:50Z Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production Badu-Apraku, Baffour Fakorede, M.A.B. Oyekunle M Akinwale, R. agriculture climate drought stress maize genotypes Extra-early maize (Zea mays L) tolerant to low-N and drought could stabilize yields in sub-Saharan Africa. Studies were conducted under drought and low-N conditions in Nigeria for three years to determine the potential of 90 extra-early inbreds for hybrid production and evaluate the performance of 36 hybrids derived from the inbreds under drought at flowering and grain-filling periods and well-watered conditions. Results showed significant ge¬notypic mean squares for grain yield and most other traits of the inbreds under drought and/or low-N conditions. TZEEI6, TZEEI4, TZEEI36, and TZEEI38 were identified as ideal inbreds under drought. Under low-N, TZEEI19, TZEEI96 and TZEEI45 were top ranking with TZEEI19 as the ideal inbred. TZEEI19, TZEEI29, TZEEI56, TZEEI38, and TZEEI79 were tolerant to both stresses. Eighteen of the 36 hybrids produced above-average yields across environments with four hybrids identified as very stable. TZEEI29 x TZEEI21 was the closest to the ideal geno¬type because it combines large mean performance with high yield stability. Hybrid yield under drought had large positive correlation with grain yield under well-watered environments. Selection for inbred traits such as days to silking and anthesis-silking interval under drought predicted fairly accurately hybrid yield under well-watered environments. It was concluded that extra-early inbreds and hybrids are not only drought escaping but also possess drought and low-N tolerant genes. 2011 2014-02-19T07:59:18Z 2014-02-19T07:59:18Z Journal Article https://hdl.handle.net/10568/34908 en Open Access Badu-Apraku B, Fakorede M, Oyekunle M, Akinwale R. 2011. Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production. Maydica 56, 29-41. |
| spellingShingle | agriculture climate drought stress maize genotypes Badu-Apraku, Baffour Fakorede, M.A.B. Oyekunle M Akinwale, R. Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title | Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title_full | Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title_fullStr | Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title_full_unstemmed | Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title_short | Selection of extra-early maize inbreds under low N and drought at flowering and grain-filling for hybrid production |
| title_sort | selection of extra early maize inbreds under low n and drought at flowering and grain filling for hybrid production |
| topic | agriculture climate drought stress maize genotypes |
| url | https://hdl.handle.net/10568/34908 |
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