Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments
Knowledge of the genetic mechanisms conditioning drought tolerance in maize is crucial to the success of hybrid breeding programs aimed at developing high-yielding cultivars under drought. The objectives of this study were to determine the combining ability of extra-early inbreds, compute the herita...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2020
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/109244 |
| _version_ | 1855514218591158272 |
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| author | Amegbor, I.K. Badu-Apraku, Baffour Adu, G.B. Adjebeng-Danquah, J. Toyinbo, J.O. |
| author_browse | Adjebeng-Danquah, J. Adu, G.B. Amegbor, I.K. Badu-Apraku, Baffour Toyinbo, J.O. |
| author_facet | Amegbor, I.K. Badu-Apraku, Baffour Adu, G.B. Adjebeng-Danquah, J. Toyinbo, J.O. |
| author_sort | Amegbor, I.K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Knowledge of the genetic mechanisms conditioning drought tolerance in maize is crucial to the success of hybrid breeding programs aimed at developing high-yielding cultivars under drought. The objectives of this study were to determine the combining ability of extra-early inbreds, compute the heritability of measured traits, assess the performance of inbreds in hybrid combinations and investigate the associations among traits under drought and optimal conditions. A total of 252 hybrids generated by crossing 63 inbreds to four testers, along with four commercial hybrid checks, were evaluated for 2 years under drought and rainfed conditions. General combining ability (GCA) and specific combining ability (SCA) for the traits were significant. A total of 57.1% and 53.4% of the genotypic sum of squares were attributable to GCA effects for grain yield under managed drought and rainfed conditions, respectively. Hybrids TZdEEI 91 × TZEEI 21 and TZdEEI 55 × TZEEI 13 out-yielded the best checks under drought and optimal conditions by 49.13% and 39.05%, respectively. The most promising hybrids with consistently high grain yield under drought and rainfed conditions, were TZdEEI 54 × TZEEI 13, TZdEEI 91 × TZEEI 21 and TZdEEI 55 × TZEEI 21 and should be further evaluated for possible commercial production in sub-Saharan Africa. |
| format | Journal Article |
| id | CGSpace109244 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1092442025-11-11T10:01:49Z Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments Amegbor, I.K. Badu-Apraku, Baffour Adu, G.B. Adjebeng-Danquah, J. Toyinbo, J.O. combining ability heritability zea diploperennis zea mays variants drought tolerance inbred lines Knowledge of the genetic mechanisms conditioning drought tolerance in maize is crucial to the success of hybrid breeding programs aimed at developing high-yielding cultivars under drought. The objectives of this study were to determine the combining ability of extra-early inbreds, compute the heritability of measured traits, assess the performance of inbreds in hybrid combinations and investigate the associations among traits under drought and optimal conditions. A total of 252 hybrids generated by crossing 63 inbreds to four testers, along with four commercial hybrid checks, were evaluated for 2 years under drought and rainfed conditions. General combining ability (GCA) and specific combining ability (SCA) for the traits were significant. A total of 57.1% and 53.4% of the genotypic sum of squares were attributable to GCA effects for grain yield under managed drought and rainfed conditions, respectively. Hybrids TZdEEI 91 × TZEEI 21 and TZdEEI 55 × TZEEI 13 out-yielded the best checks under drought and optimal conditions by 49.13% and 39.05%, respectively. The most promising hybrids with consistently high grain yield under drought and rainfed conditions, were TZdEEI 54 × TZEEI 13, TZdEEI 91 × TZEEI 21 and TZdEEI 55 × TZEEI 21 and should be further evaluated for possible commercial production in sub-Saharan Africa. 2020-07-24 2020-09-07T10:58:42Z 2020-09-07T10:58:42Z Journal Article https://hdl.handle.net/10568/109244 en Open Access application/pdf MDPI Amegbor, I.K., Badu-Apraku, B., Adu, G.B., Adjebeng-Danquah, J. & Toyinbo, J.O. (2020). Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments. Agronomy, 10(8): 1069, 2020. 1-18. |
| spellingShingle | combining ability heritability zea diploperennis zea mays variants drought tolerance inbred lines Amegbor, I.K. Badu-Apraku, Baffour Adu, G.B. Adjebeng-Danquah, J. Toyinbo, J.O. Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title | Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title_full | Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title_fullStr | Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title_full_unstemmed | Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title_short | Combining ability of extra-early maize inbreds derived from a cross between maize and Zea diploperennis and hybrid performance under contrasting environments |
| title_sort | combining ability of extra early maize inbreds derived from a cross between maize and zea diploperennis and hybrid performance under contrasting environments |
| topic | combining ability heritability zea diploperennis zea mays variants drought tolerance inbred lines |
| url | https://hdl.handle.net/10568/109244 |
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