Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa
After drought, a major challenge to smallholder farmers in sub-Saharan Africa is low-fertility soils with poor nitrogen (N)-supplying capacity. Many challenges in this region need to be overcome to create a viable fertilizer market. An intermediate solution is the development of maize varieties with an enhanced ability to take up or utilize N in severely depleted soils, and to more efficiently use the small amounts of N that farmers can supply to their crops. Over 400 elite inbred lines from seven maize breeding programs were screened to identify new sources of tolerance to low-N stress and maize lethal necrosis (MLN) for introgression into Africa-adapted elite germplasm. Lines with high levels of tolerance to both stresses were identified. Lines previously considered to be tolerant to low-N stress ranked in the bottom 10% under low-N confirming the need to replace these lines with new donors identified in this study. The lines that performed best under low-N yielded about 0. 5Mgha(-1) (20%) more in testcross combinations than some widely used commercial parent lines such as CML442 and CML395. This is the first large scale study to identify maize inbred lines with tolerance to low-N stress and MLN in eastern and southern Africa.
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Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, BREEDING METHODS, DISEASE TOLERANCE, MAIZE, BREEDING, |
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dig-cimmyt-10883-201522021-02-09T18:24:57Z Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa Das, B. Atlin, G.N. Olsen, M. Burgueño, J. Amsal Tesfaye Tarekegne Babu, R. Ndou, E. Mashingaidze, K. Lieketso Moremoholo Ligeyo, D. Matemba-Mutasa, R. Zaman-Allah, M. San Vicente, F.M. Prasanna, B.M. Cairns, J.E. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING After drought, a major challenge to smallholder farmers in sub-Saharan Africa is low-fertility soils with poor nitrogen (N)-supplying capacity. Many challenges in this region need to be overcome to create a viable fertilizer market. An intermediate solution is the development of maize varieties with an enhanced ability to take up or utilize N in severely depleted soils, and to more efficiently use the small amounts of N that farmers can supply to their crops. Over 400 elite inbred lines from seven maize breeding programs were screened to identify new sources of tolerance to low-N stress and maize lethal necrosis (MLN) for introgression into Africa-adapted elite germplasm. Lines with high levels of tolerance to both stresses were identified. Lines previously considered to be tolerant to low-N stress ranked in the bottom 10% under low-N confirming the need to replace these lines with new donors identified in this study. The lines that performed best under low-N yielded about 0. 5Mgha(-1) (20%) more in testcross combinations than some widely used commercial parent lines such as CML442 and CML395. This is the first large scale study to identify maize inbred lines with tolerance to low-N stress and MLN in eastern and southern Africa. art. 80 2019-06-12T21:24:13Z 2019-06-12T21:24:13Z 2019 Article Published Version 0014-2336 https://hdl.handle.net/10883/20152 10.1007/s10681-019-2406-5 English Maize https://static-content.springer.com/esm/art%3A10.1007%2Fs10681-019-2406-5/MediaObjects/10681_2019_2406_MOESM1_ESM.xlsx CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the sutable license for that purpose. Open Access PDF AFRICA SOUTH OF SAHARA Dordrecht (Netherlands) Springer 4 215 Euphytica |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING Das, B. Atlin, G.N. Olsen, M. Burgueño, J. Amsal Tesfaye Tarekegne Babu, R. Ndou, E. Mashingaidze, K. Lieketso Moremoholo Ligeyo, D. Matemba-Mutasa, R. Zaman-Allah, M. San Vicente, F.M. Prasanna, B.M. Cairns, J.E. Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
description |
After drought, a major challenge to smallholder farmers in sub-Saharan Africa is low-fertility soils with poor nitrogen (N)-supplying capacity. Many challenges in this region need to be overcome to create a viable fertilizer market. An intermediate solution is the development of maize varieties with an enhanced ability to take up or utilize N in severely depleted soils, and to more efficiently use the small amounts of N that farmers can supply to their crops. Over 400 elite inbred lines from seven maize breeding programs were screened to identify new sources of tolerance to low-N stress and maize lethal necrosis (MLN) for introgression into Africa-adapted elite germplasm. Lines with high levels of tolerance to both stresses were identified. Lines previously considered to be tolerant to low-N stress ranked in the bottom 10% under low-N confirming the need to replace these lines with new donors identified in this study. The lines that performed best under low-N yielded about 0. 5Mgha(-1) (20%) more in testcross combinations than some widely used commercial parent lines such as CML442 and CML395. This is the first large scale study to identify maize inbred lines with tolerance to low-N stress and MLN in eastern and southern Africa. |
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Article |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY BREEDING METHODS DISEASE TOLERANCE MAIZE BREEDING |
author |
Das, B. Atlin, G.N. Olsen, M. Burgueño, J. Amsal Tesfaye Tarekegne Babu, R. Ndou, E. Mashingaidze, K. Lieketso Moremoholo Ligeyo, D. Matemba-Mutasa, R. Zaman-Allah, M. San Vicente, F.M. Prasanna, B.M. Cairns, J.E. |
author_facet |
Das, B. Atlin, G.N. Olsen, M. Burgueño, J. Amsal Tesfaye Tarekegne Babu, R. Ndou, E. Mashingaidze, K. Lieketso Moremoholo Ligeyo, D. Matemba-Mutasa, R. Zaman-Allah, M. San Vicente, F.M. Prasanna, B.M. Cairns, J.E. |
author_sort |
Das, B. |
title |
Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
title_short |
Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
title_full |
Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
title_fullStr |
Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
title_full_unstemmed |
Identification of donors for low-nitrogen stress with maize lethal necrosis (MLN) tolerance for maize breeding in sub-Saharan Africa |
title_sort |
identification of donors for low-nitrogen stress with maize lethal necrosis (mln) tolerance for maize breeding in sub-saharan africa |
publisher |
Springer |
publishDate |
2019 |
url |
https://hdl.handle.net/10883/20152 |
work_keys_str_mv |
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