Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras
Maize (Zea mays L.) is the most important staple crop in West and Central Africa (WCA), but its production is severely constrained by low soil nitrogen (low N). Fifty-six extra-early open-pollinated maize cultivars developed during three breeding eras, 1995–2000, 2001–2006 and 2007–2012, were evalua...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Cambridge University Press
2018
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/83092 |
| _version_ | 1855535543568302080 |
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| author | Badu-Apraku, Baffour Fakorede, M.A.B. Annor, B. Talabi, A.O. |
| author_browse | Annor, B. Badu-Apraku, Baffour Fakorede, M.A.B. Talabi, A.O. |
| author_facet | Badu-Apraku, Baffour Fakorede, M.A.B. Annor, B. Talabi, A.O. |
| author_sort | Badu-Apraku, Baffour |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Maize (Zea mays L.) is the most important staple crop in West and Central Africa (WCA), but its production is severely constrained by low soil nitrogen (low N). Fifty-six extra-early open-pollinated maize cultivars developed during three breeding eras, 1995–2000, 2001–2006 and 2007–2012, were evaluated under low N and high soil nitrogen (high N) at two locations in Nigeria in 2013 and 2014, to investigate the genetic gains in grain yield and identify outstanding cultivars. During the first breeding era, the emphasis of the programme was on breeding for resistance to the maize streak virus (MSV) and high yield potential, while the major breeding emphasis during the second era was on recurrent selection for improved grain yield and Striga resistance in two extra-early-maturing source populations, TZEE-W Pop STR (white) and TZEE-Y Pop STR (yellow). Starting from the third era, the source populations were subjected to improvement for tolerance to drought, low N and resistance to Striga. A randomized incomplete block design with two replications was used for the field evaluations. Results revealed genetic gains in grain yield of 0.314 Mg ha−1 (13.29%) and 0.493 Mg ha−1 (16.84%) per era under low N and high N, respectively. The annual genetic gains in grain yield was 0.054 Mg ha–1 (2.14%) under low N and 0.081 Mg ha–1 (2.56%) under high N environments. The cultivar 2009 TZEE-OR2 STR of era 3 was the most stable, with competitive yield across environments, while 2004 TZEE-W Pop STR C4 from era 2, and TZEE-W STR 104, TZEE-W STR 108 and 2012 TZEE-W DT STR C5 from era 3 were high yielding but less stable. These cultivars should be further tested on-farm and commercialized in WCA. Substantial progress has been made in breeding for high grain yield and low-N tolerance in the sub-region. |
| format | Journal Article |
| id | CGSpace83092 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace830922024-11-15T08:52:55Z Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras Badu-Apraku, Baffour Fakorede, M.A.B. Annor, B. Talabi, A.O. maize cropping systems drought stress drought tolerance yield low soil nitrogen breeding cultivars genetic gain soil fertility Maize (Zea mays L.) is the most important staple crop in West and Central Africa (WCA), but its production is severely constrained by low soil nitrogen (low N). Fifty-six extra-early open-pollinated maize cultivars developed during three breeding eras, 1995–2000, 2001–2006 and 2007–2012, were evaluated under low N and high soil nitrogen (high N) at two locations in Nigeria in 2013 and 2014, to investigate the genetic gains in grain yield and identify outstanding cultivars. During the first breeding era, the emphasis of the programme was on breeding for resistance to the maize streak virus (MSV) and high yield potential, while the major breeding emphasis during the second era was on recurrent selection for improved grain yield and Striga resistance in two extra-early-maturing source populations, TZEE-W Pop STR (white) and TZEE-Y Pop STR (yellow). Starting from the third era, the source populations were subjected to improvement for tolerance to drought, low N and resistance to Striga. A randomized incomplete block design with two replications was used for the field evaluations. Results revealed genetic gains in grain yield of 0.314 Mg ha−1 (13.29%) and 0.493 Mg ha−1 (16.84%) per era under low N and high N, respectively. The annual genetic gains in grain yield was 0.054 Mg ha–1 (2.14%) under low N and 0.081 Mg ha–1 (2.56%) under high N environments. The cultivar 2009 TZEE-OR2 STR of era 3 was the most stable, with competitive yield across environments, while 2004 TZEE-W Pop STR C4 from era 2, and TZEE-W STR 104, TZEE-W STR 108 and 2012 TZEE-W DT STR C5 from era 3 were high yielding but less stable. These cultivars should be further tested on-farm and commercialized in WCA. Substantial progress has been made in breeding for high grain yield and low-N tolerance in the sub-region. 2018-12 2017-08-14T13:59:53Z 2017-08-14T13:59:53Z Journal Article https://hdl.handle.net/10568/83092 en Limited Access Cambridge University Press Badu-Apraku, B., Fakorede, M.A.B., Annor, B. & Talabi, A.O. (2017). Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras. Experimental Agriculture, 1-19. |
| spellingShingle | maize cropping systems drought stress drought tolerance yield low soil nitrogen breeding cultivars genetic gain soil fertility Badu-Apraku, Baffour Fakorede, M.A.B. Annor, B. Talabi, A.O. Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title | Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title_full | Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title_fullStr | Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title_full_unstemmed | Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title_short | Improvement in grain yield and low-nitrogen tolerance in maize cultivars of there eras |
| title_sort | improvement in grain yield and low nitrogen tolerance in maize cultivars of there eras |
| topic | maize cropping systems drought stress drought tolerance yield low soil nitrogen breeding cultivars genetic gain soil fertility |
| url | https://hdl.handle.net/10568/83092 |
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