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Agronomy, Volume 9, Issue 11 (November 2019)
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Cover Story (view full-size image) Accurate measurements of plant growth rates and biomass accumulation are possible using a high [...] Read more. Accurate measurements of plant growth rates and biomass accumulation are possible using a high throughput image-based phenotyping system at the Plant Accelerator in Adelaide. This facility was used to explore the flexibility of wheat plants to manage the relationship between biomass accumulation and grain protein levels. Biomass is closely related to yield and grain protein content (GPC) is a critical quality criterion for wheat. Six Australian wheat genotypes from a range of high to low GPC were grown under low, medium and high N supply in a greenhouse. Results showed that high GPC genotypes manage grain N reserves by compromising biomass production at low N and these genotypes achieved their maximum growth rate earlier at low N compared to high N-treatment. This study indicated the importance of selection under differing N supply to optimise both yield and protein in cultivars. View this paper