Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population
Eighteen S1 lines of maize (Zea mays L.) derived from a low nitrogen tolerant pool and two inbred lines were evaluated for agronomic performance under moderate N conditions in the southern Guinea savannah of Nigeria. Generally, the breeding lines differed in yield, growth, vertical rootpulling resis...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Cambridge University Press
2003
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/98168 |
| _version_ | 1855525439420760064 |
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| author | Kamara, A.Y. Kling, J.G. Menkir, A. Ibikunle, O. |
| author_browse | Ibikunle, O. Kamara, A.Y. Kling, J.G. Menkir, A. |
| author_facet | Kamara, A.Y. Kling, J.G. Menkir, A. Ibikunle, O. |
| author_sort | Kamara, A.Y. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Eighteen S1 lines of maize (Zea mays L.) derived from a low nitrogen tolerant pool and two inbred lines were evaluated for agronomic performance under moderate N conditions in the southern Guinea savannah of Nigeria. Generally, the breeding lines differed in yield, growth, vertical rootpulling resistance, N-uptake and N-use efficiency. Breeding lines with high vertical root-pulling resistance took up more N and utilized it more efficiently. They also showed better agronomic performance and recorded higher yields. Principal component and cluster analyses classified the breeding lines into six groups. The results of principal components analyses (PCA) suggest that the most important variables for the classification of the S1 lines were grain yield, plant height, total dry matter during the grain-filling period and at maturity, N-accumulation, N-uptake and N-use efficiency. Other important traits were days to silking, anthesis-silking interval, ears per plant, harvest index and vertical root-pulling resistance. Two groups containing a total of 14 S1 lines that had higher agronomic performance than others are recommended for further evaluation under severe N stress to ascertain their tolerance of low N stress before recombination to form a new population for the next cycle of selection. |
| format | Journal Article |
| id | CGSpace98168 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2003 |
| publishDateRange | 2003 |
| publishDateSort | 2003 |
| publisher | Cambridge University Press |
| publisherStr | Cambridge University Press |
| record_format | dspace |
| spelling | CGSpace981682024-11-15T08:52:31Z Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population Kamara, A.Y. Kling, J.G. Menkir, A. Ibikunle, O. nitrogen maize Eighteen S1 lines of maize (Zea mays L.) derived from a low nitrogen tolerant pool and two inbred lines were evaluated for agronomic performance under moderate N conditions in the southern Guinea savannah of Nigeria. Generally, the breeding lines differed in yield, growth, vertical rootpulling resistance, N-uptake and N-use efficiency. Breeding lines with high vertical root-pulling resistance took up more N and utilized it more efficiently. They also showed better agronomic performance and recorded higher yields. Principal component and cluster analyses classified the breeding lines into six groups. The results of principal components analyses (PCA) suggest that the most important variables for the classification of the S1 lines were grain yield, plant height, total dry matter during the grain-filling period and at maturity, N-accumulation, N-uptake and N-use efficiency. Other important traits were days to silking, anthesis-silking interval, ears per plant, harvest index and vertical root-pulling resistance. Two groups containing a total of 14 S1 lines that had higher agronomic performance than others are recommended for further evaluation under severe N stress to ascertain their tolerance of low N stress before recombination to form a new population for the next cycle of selection. 2003-09 2018-11-14T06:53:41Z 2018-11-14T06:53:41Z Journal Article https://hdl.handle.net/10568/98168 en Limited Access Cambridge University Press Kamara, A.Y., Kling, J.G., Menkir, A. & Ibikunle, O. (2003). Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population. The Journal of Agricultural Science, 141(2), 221-230. |
| spellingShingle | nitrogen maize Kamara, A.Y. Kling, J.G. Menkir, A. Ibikunle, O. Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title | Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title_full | Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title_fullStr | Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title_full_unstemmed | Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title_short | Agronomic performance of maize (Zea mays L.) breeding lines derived from a low nitrogen maize population |
| title_sort | agronomic performance of maize zea mays l breeding lines derived from a low nitrogen maize population |
| topic | nitrogen maize |
| url | https://hdl.handle.net/10568/98168 |
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