£2.8 Million Maize Project Targets Higher Yields With Less Water

University of Essex plant biologist John Ferguson has secured a £2.8 million UK Research and Innovation Future Leaders Fellowship for a four year programme to develop higher yielding maize that uses less water. The university said the work will combine crop physiology, breeding and gene editing, with the aim of producing material relevant to both large scale agriculture and drought exposed farming systems in sub Saharan Africa.

The programme puts stomata, the microscopic pores that regulate carbon dioxide uptake and water vapour loss through leaves, at the centre of the breeding strategy. According to the University of Essex, stomata account for about 95 percent of plant water loss. That makes their number and behaviour a practical target when researchers are trying to improve water use without simply reducing growth.

The biological tradeoff is important. Closing stomata or reducing their density can conserve water, but it can also restrict the carbon dioxide needed for photosynthesis. Ferguson's project is designed to test whether maize can be bred with stomatal traits that reduce unnecessary water loss while preserving the carbon gain and productivity required for commercially useful yields.

Researchers plan to develop high yielding hybrids and gene edited maize lines, then assess their performance through physiological measurement and field testing. The funding supports a development pipeline, not a finished commercial variety. Any claim of drought resilience will therefore depend on evidence from multiple environments, seasons and genetic backgrounds rather than laboratory results alone.

The project includes collaboration with Jill Cairns at the International Maize and Wheat Improvement Center in Zimbabwe, where the work can be connected with breeding priorities in drought affected production regions. Leonardo Caproni will also continue a European maize collaboration with Ferguson, linking the new fellowship to existing work on crop adaptation and plant water relations.

The scientific foundation includes earlier research on reducing stomatal density in crops that use the C4 photosynthetic pathway, which includes maize. Translating that mechanism into dependable farm performance remains the difficult step. Researchers will need to show that any water saving trait holds under heat, variable soil moisture and real planting densities without creating a yield penalty.

For breeders and growers, the potential value is a wider set of selection targets than maximum yield under well watered conditions. If the traits perform consistently, maize programmes could place more weight on yield stability per unit of water. That would matter in regions where irrigation costs are rising, rainfall is less predictable and drought can erase otherwise strong genetic yield potential.

The next evidence to watch will be the release of breeding material, results from multi location trials, measurements of water use and yield stability, and signs that public or commercial breeders are adopting the traits. Until those data emerge, the fellowship should be understood as a substantial research investment with a clear production objective, rather than proof that a drought tolerant maize product is ready for farmers.