Achieving yield gains in wheat

Reynolds, Matthew and Foulkes, John and Furbank, Robert and Griffiths, Simon and King, Julie and Murchie, Erik and Parry, Martin and Slafer, Gustavo (2012) Achieving yield gains in wheat. Plant, Cell and Environment, 35 (10). pp. 1799-1823. ISSN 0140-7791

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Abstract

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 CO2 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.

Item Type:
Journal Article
Journal or Publication Title:
Plant, Cell and Environment
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1300/1314
Subjects:
ID Code:
75973
Deposited By:
Deposited On:
21 Oct 2015 05:03
Refereed?:
Yes
Published?:
Published
Last Modified:
04 Jul 2020 02:54