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Northern leaf blight response of elite maize inbred lines adapted to the mid-altitude sub-humid Tropics

Creator: Abera, W.
Creator: Shimelis, H.
Creator: Derera, J.
Creator: Regasa, M.W.
Creator: Laing, M.D.
Year: 2016
URI: https://hdl.handle.net/10883/21127
Language: English
Publisher: Akadémiai Kiadó
Publisher: Springer
Copyright: 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.
Type: Article
Place of Publication: Szeged (Hungary)
Pages: 141-152
Issue: 1
Volume: 44
DOI: 10.1556/0806.43.2015.037
Keywords: Exserohilum turcicum
Keywords: Leaf Blight
Keywords: Resistance Breeding
Publisher URI: https://link.springer.com/article/10.1556/0806.43.2015.037#rightslink
Publisher URI: https://akjournals.com/view/journals/0806/44/1/article-p141.xml
Description: Productivity of maize (Zea mays L.) is curtailed by a number of stress factors, predominantly by diseases and insect pests. The Northern leaf blight disease of maize caused by Exserohilum turcicum (Pass.) Leonard and Suggs inflict significant yield losses in the humid tropical regions. The objectives of this study were to determine the leaf blight response of 50 elite maize inbred lines developed for the mid-altitude, sub-humid tropics and to select promising parents for resistance breeding. Inbred lines were evaluated in the field using a 5 × 10 alpha lattice design with three replications. Plants were artificially inoculated at the 4–6 leaf stages during 2011 and 2012. Data on disease severity and incidence, AUDPC and yields were recorded. Inbred lines had significant differences for E. turcicum reactions, and were classified into resistant, intermediate or susceptible categories. The mean disease severity ranged from 2.04% for the inbred line 136-a to 3.25% (Kuleni-C1-101-1-1-1). The upper leaf area infection of inbred lines 143-5-I and 136-a was 3.3%, while the line Kuleni-C1-101-1-1-1 displayed 100% infection. Further, 136-a developed the lowest AUDPC score at 238, whereas Kuleni-C1-101-1-1-1 had the maximum at 700. Overall, inbred lines CML202, 144-7-b, 139-5-j, 136-a, 30H83-7-1-1-1-2-1, ILoo’E-1-9-1-1-1-1-1 and 142-1-e, were identified as promising sources of resistance against E. turcicum. The selected elite inbred lines would be recommended for use in general varietal development, disease management and to enhance maize productivity, in the mid-altitude sub-humid tropics.
Agrovoc: SETOSPHAERIA TURCICA
Agrovoc: INBRED LINES
Agrovoc: MAIZE
Agrovoc: RESISTANCE
Agrovoc: PLANT BREEDING
Agrovoc: BLIGHT
ISSN: 0133-3720
Journal: Cereal Research Communications


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  • Maize
    Maize breeding, phytopathology, entomology, physiology, quality, and biotech

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