Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments
Genetic gain studies in a breeding program are very important for measuring the efficiency of the program over a specific period. It also provides breeders with an understanding of the outcomes of the huge investments committed to the breeding programs. This study sought to (i) estimate the gains in...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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MDPI
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/116042 |
| _version_ | 1855529133509967872 |
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| author | Badu-Apraku, Baffour Obisesan, O. Adeoti, A. Obeng-Bio, E. |
| author_browse | Adeoti, A. Badu-Apraku, Baffour Obeng-Bio, E. Obisesan, O. |
| author_facet | Badu-Apraku, Baffour Obisesan, O. Adeoti, A. Obeng-Bio, E. |
| author_sort | Badu-Apraku, Baffour |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genetic gain studies in a breeding program are very important for measuring the efficiency of the program over a specific period. It also provides breeders with an understanding of the outcomes of the huge investments committed to the breeding programs. This study sought to (i) estimate the gains in grain yield under drought and rainfed conditions and (ii) identify high-yielding and stable hybrids developed in the last two decades under drought and rainfed conditions. Sixty extra-early maturing hybrids developed by the International Institute of Tropical Agriculture (IITA), Ibadan, during three breeding periods: (2008–2010, 2011–2013, and 2014–2016) were assessed under managed drought and rainfed conditions across 14 environments in Nigeria to estimate the genetic gains in grain yield using linear regression analysis. Considerably high genetic gains (4.1%) per year for grain yield was obtained for the extra-early maturing hybrids under drought environments. Six of the top ten hybrids identified were from period 3, an indication of the high genetic gains from selection in period 3. Additionally, two of the top six period 3 hybrids (TZEEI 29 × TZEEI 13) × TZEEI 64 and TZdEEI 64 × TZEEI 54 were found to be the best yielding and most stable across the 14 test environments and were highly recommended for extensive evaluations to warrant their commercialization in sub-Saharan Africa (SSA). |
| format | Journal Article |
| id | CGSpace116042 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1160422025-11-11T10:33:02Z Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments Badu-Apraku, Baffour Obisesan, O. Adeoti, A. Obeng-Bio, E. maize maturity genetic gain drought rainfed management zea mays west africa Genetic gain studies in a breeding program are very important for measuring the efficiency of the program over a specific period. It also provides breeders with an understanding of the outcomes of the huge investments committed to the breeding programs. This study sought to (i) estimate the gains in grain yield under drought and rainfed conditions and (ii) identify high-yielding and stable hybrids developed in the last two decades under drought and rainfed conditions. Sixty extra-early maturing hybrids developed by the International Institute of Tropical Agriculture (IITA), Ibadan, during three breeding periods: (2008–2010, 2011–2013, and 2014–2016) were assessed under managed drought and rainfed conditions across 14 environments in Nigeria to estimate the genetic gains in grain yield using linear regression analysis. Considerably high genetic gains (4.1%) per year for grain yield was obtained for the extra-early maturing hybrids under drought environments. Six of the top ten hybrids identified were from period 3, an indication of the high genetic gains from selection in period 3. Additionally, two of the top six period 3 hybrids (TZEEI 29 × TZEEI 13) × TZEEI 64 and TZdEEI 64 × TZEEI 54 were found to be the best yielding and most stable across the 14 test environments and were highly recommended for extensive evaluations to warrant their commercialization in sub-Saharan Africa (SSA). 2021 2021-11-12T15:11:25Z 2021-11-12T15:11:25Z Journal Article https://hdl.handle.net/10568/116042 en Open Access application/pdf MDPI Badu-Apraku, B., Obesesan, O., Abiodun, A. & Obeng-Bio, E. (2021). Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments. Agronomy, 11(5), 831: 1-18. |
| spellingShingle | maize maturity genetic gain drought rainfed management zea mays west africa Badu-Apraku, Baffour Obisesan, O. Adeoti, A. Obeng-Bio, E. Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title | Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title_full | Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title_fullStr | Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title_full_unstemmed | Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title_short | Genetic gains from selection for drought tolerance during three breeding periods in extra-early maturing maize hybrids under drought and rainfed environments |
| title_sort | genetic gains from selection for drought tolerance during three breeding periods in extra early maturing maize hybrids under drought and rainfed environments |
| topic | maize maturity genetic gain drought rainfed management zea mays west africa |
| url | https://hdl.handle.net/10568/116042 |
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