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Genetic analysis of water-logging tolerance in tropical maize (Zea Mays L.)

Author: Zaidi, P.H.
Author: Maniselvan, P.
Author: Srivastava, A.
Author: Yadav, P.
Author: Singh, R.P.
Year: 2010
ISSN: 0025-6153
URI: http://hdl.handle.net/10883/3104
Abstract: Approximately 80% of maize (Zea mays L.) in South and Southeast Asia is grown as a rain-fed crop, where temporary excessive soil moisture or water-logging during the summer-rainy season is one of the major production constraints in large areas of this region. The present genetic study analyzed the tolerance of tropical maize to water-logging stress. Elite maize inbred lines with known stable performance in terms of improved grain yield under water-logging stress were crossed using half-diallel (7 x 7) and line × tester (8 × 3) mating designs, in which four lines were common in both the mating designs. F1 progenies (excluding reciprocals) and their parents were evaluated under managed water-logging stress at knee high stage (V7-8 growth stage) at the maize research farm, Indian Agricultural Research Institute, New Delhi, India (28.4°N, 77.1°E, 228.1 masl). In addition, the same set of entries was simultaneously evaluated under a normal moisture regime. Analysis showed that both general combining ability (GCA) and specific combining ability (SCA) effects were statistically significant. However, the GCA effect was comparatively higher (P<0.01) than the SCA effect (P<0.05). This result suggests that both additive and non-additive factors affect the expression of tolerance to water-logging stress in tropical maize. Analysis of the diallel and L × T dataset showed that water-logging tolerance in maize followed an additive-dominance genetic model, with additive gene effects dominating. Our findings suggest that reciprocal recurrent selection would be an effective approach for improving water-logging tolerance in tropical maize. Evaluating S1 progeny per se and their test-crosses under managed water-logging stress, discarding susceptible fraction and combining the selected best lines in terms of per se and test-cross performance could result in improved water-logging tolerant population. The new lines derived from the improved population could be used in developing water-logging tolerant synthetic varieties to exploit the additive gene effects and hybrids to exploit the non-additive gene action.
Format: PDF
Language: English
Publisher: Consiglio per la Ricerca e la sperimentazione in Agricoltura, Unità di Ricerca per la Valorizzazione qualitativa dei cereali
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
Region: Global
Pages: 17-26
Issue: 1
Volume: 55
Keywords: Excess Soil Moisture
Keywords: Maize
Keywords: Water-logging
Keywords: Excess soil moisture
Keywords: Genetics
Keywords: Inheritance
Country of Focus: SOUTH ASIA
Country of Focus: EAST ASIA
Country of Focus: SOUTHEAST ASIA
Agrovoc: MAIZE
Agrovoc: WATERLOGGING
Agrovoc: SOIL WATER CONTENT
Agrovoc: GENETIC INHERITANCE
Journal: Maydica


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

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