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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional de Colombia
2018
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| Online Access: | https://www.redalyc.org/articulo.oa?id=180358913010 https://www.redalyc.org/journal/1803/180358913010/ https://www.redalyc.org/journal/1803/180358913010/html/ https://www.redalyc.org/journal/1803/180358913010/180358913010.epub https://www.redalyc.org/journal/1803/180358913010/movil |
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Table of Contents:
- Development of a new maize hybrid for the Ecuadorian lowland Ricardo Limongi-Andrade Daniel Alarcón-Cobeña Eddie Zambrano-Zambrano Marlon Caicedo Paúl Villavicencio-Linzan José Eguez Bernardo Navarrete Carlos Yanez José L. Zambrano Agrociencias Breeding stability food security climate change Yellow maize (Zea mays L. var. indurata) is mainly produced in the Ecuadorian lowlands (less than 1,200 m a.s.l.), primarily for feed production. Although Ecuador has recently increased maize production, new genotypes are needed for self-sufficiency and in order to avoid costly imports. Maize is sown mostly from December to January during the rainy season. However, the irregularity of rainfall has become a constraint on production. "INIAP H-603 Superior" is a new single-cross maize hybrid developed for the Ecuadorian lowlands with improved yields, which could contribute to domestic food security. The new hybrid had an average yield of 8.48 t ha-1 with outstanding performance under the rainfall, sustained moisture, and irrigation conditions, outperforming the commercial hybrids INIAP H-602, DEKALB-7088 and INIAP H-553. Additionally, the new hybrid showed tolerance to the principal foliar diseases: leaf blight (Exserohilum turcicum), rust (Puccinia sorghi), and leaf spot (Curvularia lunata), as well as good adaptability and stability, with a regression coefficient (bi) of 0.98 when it was evaluated in 29 locations from 2010 to 2013. The greatest yield potential of the new hybrid (10.82 t ha-1) was obtained with irrigation during the dry season. 2018 artículo científico 0120-9965 https://www.redalyc.org/articulo.oa?id=180358913010 https://www.redalyc.org/journal/1803/180358913010/ https://www.redalyc.org/journal/1803/180358913010/html/ https://www.redalyc.org/journal/1803/180358913010/180358913010.epub https://www.redalyc.org/journal/1803/180358913010/movil 10.15446/agron.colomb.v36n2.68782 en http://www.redalyc.org/revista.oa?id=1803 Agronomía Colombiana application/pdf Universidad Nacional de Colombia Agronomía Colombiana (Colombia) Num.2 Vol.36