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      Rates of yield gain of hard red spring wheat in western Canada

      1 , 2
      Canadian Journal of Plant Science
      Agricultural Institute of Canada

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          Wheat Yield Progress Associated with Higher Stomatal Conductance and Photosynthetic Rate, and Cooler Canopies

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            Achieving yield gains in wheat.

            Wheat provides 20% of calories and protein consumed by humans. Recent genetic gains are <1% per annum (p.a.), insufficient to meet future demand. The Wheat Yield Consortium brings expertise in photosynthesis, crop adaptation and genetics to a common breeding platform. Theory suggest radiation use efficiency (RUE) of wheat could be increased ~50%; strategies include modifying specificity, catalytic rate and regulation of Rubisco, up-regulating Calvin cycle enzymes, introducing chloroplast CO(2) concentrating mechanisms, optimizing light and N distribution of canopies while minimizing photoinhibition, and increasing spike photosynthesis. Maximum yield expression will also require dynamic optimization of source: sink so that dry matter partitioning to reproductive structures is not at the cost of the roots, stems and leaves needed to maintain physiological and structural integrity. Crop development should favour spike fertility to maximize harvest index so phenology must be tailored to different photoperiods, and sensitivity to unpredictable weather must be modulated to reduce conservative responses that reduce harvest index. Strategic crossing of complementary physiological traits will be augmented with wide crossing, while genome-wide selection and high throughput phenotyping and genotyping will increase efficiency of progeny screening. To ensure investment in breeding achieves agronomic impact, sustainable crop management must also be promoted through crop improvement networks. © 2012 Blackwell Publishing Ltd.
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              Yield Potential Progress in Short Bread Wheats in Northwest Mexico

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                Author and article information

                Journal
                Canadian Journal of Plant Science
                Can. J. Plant Sci.
                Agricultural Institute of Canada
                0008-4220
                1918-1833
                January 2014
                January 2014
                : 94
                : 1
                : 1-13
                Affiliations
                [1 ]Cereal Research Center, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9
                [2 ]Lethbridge Research Centre, Agriculture and Agri-Food Canada, 5403 1st Avenue South, Lethbridge, Alberta, Canada T1J 4B1
                Article
                10.4141/cjps2013-160
                7202cc42-e012-4c15-91f0-66e5928933ef
                © 2014

                http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining

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