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    Advances in improving tolerance to waterlogging in Brachiaria grasses

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    Authors
    Cardoso, J.A.
    Jiménez, JC
    Rincón, J
    Guevara, Edward D.
    Hoek, Rein van der
    Jarvis, Andy
    Peters, Michael
    Miles, John W.
    Ayarza, Miguel Angel
    Cajas, S.
    Rincón, A
    Mateus, H
    Quiceno, J
    Barragán, W.
    Lascano, Carlos E.
    Argel, P.J.
    Mena, M
    Hertentains, L.
    Rao, Idupulapati M.
    Date
    2013
    Language
    en
    Type
    Conference Paper
    Accessibility
    Open Access
    Metadata
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    Citation
    Cardoso JA, Jiménez JC, Rincón J, Guevara E, van der Hoek R, Jarvis A, Peters M, Miles J, Ayarza M, Cajas S, Rincón A, Mateus H, Quiceno J, Barragán W, Lascano C, Argel P, Mena M, Hertentains L, Rao I. 2013. Advances in improving tolerance to waterlogging in Brachiaria grasses. In: Michalk DL, Millar GD, Badgery WB, Broadfoot KM, eds. Proceedings of the 22nd International Grasslands Congress held in Sydney, Australia, 15-19 September 2013. Orange New South Wales, Australia: New South Wales Department of Primary Industry. p. 118-121
    Permanent link to cite or share this item: http://hdl.handle.net/10568/52042
    External link to download this item: http://www.internationalgrasslands.org/files/igc/publications/2013/proceedings-22nd-igc.pdf
    Abstract/Description
    Poor drainage is found on about 11.3% of agricultural land in Latin America where physiography promotes flooding, high groundwater tables, or stagnant surface water (waterlogging). Waterlogging drastically reduces oxygen diffusion into the soil causing hypoxia which is the main limitation that reduces root aerobic respiration and the absorption of minerals and water. Under waterlogging conditions plants can adapt with traits and mechanisms that improve root aeration such as production of aerenchyma and development of adventitious roots. During the rainy season Brachiaria pastures are exposed to waterlogging conditions that can severely limit pasture productivity and hence animal production. The main objective of an inter-institutional and multidisciplinary project was to identify Brachiaria hybrids combining waterlogging tolerance with high forage yield and quality to improve meat and milk production and mitigate the impacts of climate change in the humid areas of Latin America. Researchers at the Centro Internacional de Agricultura Tropical (CIAT) have developed a screening method to evaluate waterlogging tolerance in Brachiaria. Using this method, 71 promising hybrids derived from three Brachiaria species (B. ruziziensis, B. brizantha, and B. decumbens) were evaluated. Four hybrids were identified as superior in waterlogging tolerance. Their superiority was based on greater green leaf biomass production, a greater proportion of green leaf to total leaf biomass, greater green leaf area, leaf chlorophyll content, and photosynthetic efficiency, and reduced dead leaf biomass. These hybrids together with previously selected hybrids and germplasm accessions are being field-tested for waterlogging tolerance in collaboration with National Agricultural Research Institutions and farmers from Colombia, Nicaragua, and Panama.
    CGIAR Author ORCID iDs
    Idupulapati M. Raohttps://orcid.org/0000-0002-8381-9358
    CGIAR Affiliations
    Climate Change, Agriculture and Food Security
    AGROVOC Keywords
    CLIMATE; AGRICULTURE; BRACHIARIA; DRAINAGE; WATERLOGGING; HYBRIDS
    Subjects
    CLIMATE-SMART TECHNOLOGIES AND PRACTICES;
    Countries
    COLOMBIA; NICARAGUA; PANAMA
    Regions
    LATIN AMERICA; SOUTH AMERICA
    Collections
    • CCAFS Working Papers [283]
    • CIAT Conference Papers [943]

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