Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018
Genetic gain estimation in a breeding program provides an opportunity to monitor breeding efficiency and genetic progress over a specific period. The present study was conducted to (i) assess the genetic gains in grain yield of the early maturing maize hybrids developed by the International Maize an...
| Main Authors: | , , , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
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Frontiers Media
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/138080 |
| _version_ | 1855539373873823744 |
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| author | Tarekegne, Amsal Tesfaye Gissa, Dagne Wegary Cairns, Jill E. Zaman-Allah, Mainassara Beyene, Yoseph Negera, Demewoz Chere, Adefris Teklewold Fantaye, Kindie Tesfaye Jumbo, MacDonald B. Das, Biswanath Nhamucho, Egas Simpasa, Kelvin Kaonga, Kesbell K. Mashingaidze, Kingstone Ndhlela, Thokozile Mhike, Xavier Prasanna, Boddupalli M. |
| author_browse | Beyene, Yoseph Cairns, Jill E. Chere, Adefris Teklewold Das, Biswanath Fantaye, Kindie Tesfaye Gissa, Dagne Wegary Jumbo, MacDonald B. Kaonga, Kesbell K. Mashingaidze, Kingstone Mhike, Xavier Ndhlela, Thokozile Negera, Demewoz Nhamucho, Egas Prasanna, Boddupalli M. Simpasa, Kelvin Tarekegne, Amsal Tesfaye Zaman-Allah, Mainassara |
| author_facet | Tarekegne, Amsal Tesfaye Gissa, Dagne Wegary Cairns, Jill E. Zaman-Allah, Mainassara Beyene, Yoseph Negera, Demewoz Chere, Adefris Teklewold Fantaye, Kindie Tesfaye Jumbo, MacDonald B. Das, Biswanath Nhamucho, Egas Simpasa, Kelvin Kaonga, Kesbell K. Mashingaidze, Kingstone Ndhlela, Thokozile Mhike, Xavier Prasanna, Boddupalli M. |
| author_sort | Tarekegne, Amsal Tesfaye |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genetic gain estimation in a breeding program provides an opportunity to monitor breeding efficiency and genetic progress over a specific period. The present study was conducted to (i) assess the genetic gains in grain yield of the early maturing maize hybrids developed by the International Maize and Wheat Improvement Center (CIMMYT) Southern African breeding program during the period 2000–2018 and (ii) identify key agronomic traits contributing to the yield gains under various management conditions. Seventy-two early maturing hybrids developed by CIMMYT and three commercial checks were assessed under stress and non-stress conditions across 68 environments in seven eastern and southern African countries through the regional on-station trials. Genetic gain was estimated as the slope of the regression of grain yield and other traits against the year of first testing of the hybrid in the regional trial. The results showed highly significant (p< 0.01) annual grain yield gains of 118, 63, 46, and 61 kg ha−1 year−1 under optimum, low N, managed drought, and random stress conditions, respectively. The gains in grain yield realized in this study under both stress and non-stress conditions were associated with improvements in certain agronomic traits and resistance to major maize diseases. The findings of this study clearly demonstrate the significant progress made in developing productive and multiple stress-tolerant maize hybrids together with other desirable agronomic attributes in CIMMYT’s hybrid breeding program. |
| format | Journal Article |
| id | CGSpace138080 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Frontiers Media |
| publisherStr | Frontiers Media |
| record_format | dspace |
| spelling | CGSpace1380802025-12-08T10:29:22Z Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 Tarekegne, Amsal Tesfaye Gissa, Dagne Wegary Cairns, Jill E. Zaman-Allah, Mainassara Beyene, Yoseph Negera, Demewoz Chere, Adefris Teklewold Fantaye, Kindie Tesfaye Jumbo, MacDonald B. Das, Biswanath Nhamucho, Egas Simpasa, Kelvin Kaonga, Kesbell K. Mashingaidze, Kingstone Ndhlela, Thokozile Mhike, Xavier Prasanna, Boddupalli M. drought tolerance early maturation genetic gain hybrids stress maize Genetic gain estimation in a breeding program provides an opportunity to monitor breeding efficiency and genetic progress over a specific period. The present study was conducted to (i) assess the genetic gains in grain yield of the early maturing maize hybrids developed by the International Maize and Wheat Improvement Center (CIMMYT) Southern African breeding program during the period 2000–2018 and (ii) identify key agronomic traits contributing to the yield gains under various management conditions. Seventy-two early maturing hybrids developed by CIMMYT and three commercial checks were assessed under stress and non-stress conditions across 68 environments in seven eastern and southern African countries through the regional on-station trials. Genetic gain was estimated as the slope of the regression of grain yield and other traits against the year of first testing of the hybrid in the regional trial. The results showed highly significant (p< 0.01) annual grain yield gains of 118, 63, 46, and 61 kg ha−1 year−1 under optimum, low N, managed drought, and random stress conditions, respectively. The gains in grain yield realized in this study under both stress and non-stress conditions were associated with improvements in certain agronomic traits and resistance to major maize diseases. The findings of this study clearly demonstrate the significant progress made in developing productive and multiple stress-tolerant maize hybrids together with other desirable agronomic attributes in CIMMYT’s hybrid breeding program. 2024-01 2024-01-19T00:13:16Z 2024-01-19T00:13:16Z Journal Article https://hdl.handle.net/10568/138080 en Open Access application/pdf Frontiers Media Tarekegne, A., Wegary, D., Cairns, J. E., Zaman-Allah, M., Beyene, Y., Negera, D., Teklewold, A., Tesfaye, K., Jumbo, M. B., Das, B., Nhamucho, E. J., Simpasa, K., Kaonga, K. K. E., Mashingaidze, K., Thokozile, N., Mhike, X., & Prasanna, B. M. (2024). Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018. Frontiers in Plant Science, 14. https://doi.org/10.3389/fpls.2023.1321308 |
| spellingShingle | drought tolerance early maturation genetic gain hybrids stress maize Tarekegne, Amsal Tesfaye Gissa, Dagne Wegary Cairns, Jill E. Zaman-Allah, Mainassara Beyene, Yoseph Negera, Demewoz Chere, Adefris Teklewold Fantaye, Kindie Tesfaye Jumbo, MacDonald B. Das, Biswanath Nhamucho, Egas Simpasa, Kelvin Kaonga, Kesbell K. Mashingaidze, Kingstone Ndhlela, Thokozile Mhike, Xavier Prasanna, Boddupalli M. Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title | Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title_full | Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title_fullStr | Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title_full_unstemmed | Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title_short | Genetic gains in early maturing maize hybrids developed by the International Maize and Wheat Improvement Center in Southern Africa during 2000–2018 |
| title_sort | genetic gains in early maturing maize hybrids developed by the international maize and wheat improvement center in southern africa during 2000 2018 |
| topic | drought tolerance early maturation genetic gain hybrids stress maize |
| url | https://hdl.handle.net/10568/138080 |
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