Summary
This international study analysed archived wheat grain samples spanning 1850–2016 to track nutritional quality changes during the modern agricultural era. The research found that whilst carbohydrate content increased, mineral and protein composition declined significantly, with the sharpest deterioration occurring after the 1960s coinciding with rising atmospheric CO₂, temperature increases, and the adoption of semi-dwarf wheat varieties. The work implicates altered crop physiology driven by climate and breeding selection in historical shifts towards lower nutritional density in wheat.
UK applicability
The Broadbalk experiment forms a substantial portion of this dataset, making findings directly relevant to UK cereal production and wheat breeding history. The long-term trends documented here inform understanding of how UK breeding and agronomic practices have influenced grain quality, with implications for current efforts to restore nutrient density in domestic wheat varieties.
Key measures
Grain carbohydrate content, mineral composition, protein content, yield across 166-year period
Outcomes reported
The study analysed wheat grain samples collected between 1850 and 2016 from the Broadbalk Continuous Wheat Experiment and herbaria from 16 countries to assess changes in yield and nutritional quality traits. Findings documented increases in carbohydrate content alongside declines in mineral composition and protein content, with particularly marked imbalance after the 1960s.
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