Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages
Two widely-used open pollinated maize (Zea mays L.) cultivars from East Africa, Katumani and Kito composites, developed and improved for early maturity, grain yield and drought escape were evaluated for drought tolerance at seedling and flowering stages, and compared with other drought tolerant maize populations. Under seedling-stage, the early maturing cultivars were the most drought tolerant with large biomass accumulation in both stress and non-stress environments. However, root weight and the root: shoot ratio were relatively small. Under drought at flowering, these cultivars flowered early and reached anthesis in 66 days (d) for Katumani and 73 d for Kito, compared to an average of 100 d for the trial. Grain yields were (359 kg ha-1 for Katumani and 679 kg ha-1 for Kito) than the trial average of 1002 kg ha-1 under severe stress. Under well-watered conditions the yields were 3,295 kg ha-1 for Katumani, 4,651 kg ha-1 for Kito compared to the trial average of 5,737 kg ha-1. Low grain yield was associated with a large anthesis-silking interval (ASI) of 28 d in Katumani compared to an average of 18 d for the trial; and strong leaf rolling and high leaf abscisic acid concentration. Katumani and Kito were less stable for yield across water availability environments.
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Language: | English |
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African Crop Science Society
1998
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Subjects: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY, Abscisic Acid, Anthesis-Silking Interval, Root:Shoot Ratio, ABA, FLOWERING, DROUGHT TOLERANCE, YIELDS, STABILITY, ROOTS, SHOOTS, |
Online Access: | http://hdl.handle.net/10883/1958 |
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dig-cimmyt-10883-19582023-12-04T14:37:01Z Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages Mugo, S.N. Smith, M.E. Bänziger, M. Setter, T.L. Edmeades, G.O. Elings, A. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS Two widely-used open pollinated maize (Zea mays L.) cultivars from East Africa, Katumani and Kito composites, developed and improved for early maturity, grain yield and drought escape were evaluated for drought tolerance at seedling and flowering stages, and compared with other drought tolerant maize populations. Under seedling-stage, the early maturing cultivars were the most drought tolerant with large biomass accumulation in both stress and non-stress environments. However, root weight and the root: shoot ratio were relatively small. Under drought at flowering, these cultivars flowered early and reached anthesis in 66 days (d) for Katumani and 73 d for Kito, compared to an average of 100 d for the trial. Grain yields were (359 kg ha-1 for Katumani and 679 kg ha-1 for Kito) than the trial average of 1002 kg ha-1 under severe stress. Under well-watered conditions the yields were 3,295 kg ha-1 for Katumani, 4,651 kg ha-1 for Kito compared to the trial average of 5,737 kg ha-1. Low grain yield was associated with a large anthesis-silking interval (ASI) of 28 d in Katumani compared to an average of 18 d for the trial; and strong leaf rolling and high leaf abscisic acid concentration. Katumani and Kito were less stable for yield across water availability environments. 329-344 2013-06-07T21:07:52Z 2013-06-07T21:07:52Z 1998 Article http://hdl.handle.net/10883/1958 10.4314/acsj.v6i4.27783 English 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 suitable license for that purpose. Open Access PDF African Crop Science Society http://www.bioline.org.br/abstract?cs98035 4 6 African Crop Science Journal |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS |
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AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS Mugo, S.N. Smith, M.E. Bänziger, M. Setter, T.L. Edmeades, G.O. Elings, A. Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
description |
Two widely-used open pollinated maize (Zea mays L.) cultivars from East Africa, Katumani and Kito composites, developed and improved for early maturity, grain yield and drought escape were evaluated for drought tolerance at seedling and flowering stages, and compared with other drought tolerant maize populations. Under seedling-stage, the early maturing cultivars were the most drought tolerant with large biomass accumulation in both stress and non-stress environments. However, root weight and the root: shoot ratio were relatively small. Under drought at flowering, these cultivars flowered early and reached anthesis in 66 days (d) for Katumani and 73 d for Kito, compared to an average of 100 d for the trial. Grain yields were (359 kg ha-1 for Katumani and 679 kg ha-1 for Kito) than the trial average of 1002 kg ha-1 under severe stress. Under well-watered conditions the yields were 3,295 kg ha-1 for Katumani, 4,651 kg ha-1 for Kito compared to the trial average of 5,737 kg ha-1. Low grain yield was associated with a large anthesis-silking interval (ASI) of 28 d in Katumani compared to an average of 18 d for the trial; and strong leaf rolling and high leaf abscisic acid concentration. Katumani and Kito were less stable for yield across water availability environments. |
format |
Article |
topic_facet |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY Abscisic Acid Anthesis-Silking Interval Root:Shoot Ratio ABA FLOWERING DROUGHT TOLERANCE YIELDS STABILITY ROOTS SHOOTS |
author |
Mugo, S.N. Smith, M.E. Bänziger, M. Setter, T.L. Edmeades, G.O. Elings, A. |
author_facet |
Mugo, S.N. Smith, M.E. Bänziger, M. Setter, T.L. Edmeades, G.O. Elings, A. |
author_sort |
Mugo, S.N. |
title |
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
title_short |
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
title_full |
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
title_fullStr |
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
title_full_unstemmed |
Performance of early maturing Katumani and Kito maize composites under drought at the seedling and flowering stages |
title_sort |
performance of early maturing katumani and kito maize composites under drought at the seedling and flowering stages |
publisher |
African Crop Science Society |
publishDate |
1998 |
url |
http://hdl.handle.net/10883/1958 |
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