Perennial Grain Crop Development and Management

Perennial grain crops represent a transformative approach to sustainable agriculture by combining the ecological benefits of deep-rooted perennials with the food-production capacity of cereals. Through breeding programmes and hybridisations with wild relatives, species such as intermediate wheatgrass, perennial rice and emerging candidates like silflower have been domesticated to yield harvestable seeds over multiple seasons. These crops improve soil health by enhancing organic matter, reducing erosion and minimising nutrient leaching. Management practices—from establishment techniques and post-harvest thinning to integrated farmer decision frameworks—are evolving to maintain yield and persistence. Adoption by smallholders and commercial growers alike has underscored global potential, with demonstrable labour and input savings alongside steady grain production. Ongoing research integrates genetic gains, agronomic optimisation and socio-economic perspectives to scale perennial grains within diverse farming systems.

Research from Nature Portfolio

Recent studies have demonstrated the breeding and agronomic assessment of a perennial rice derived from Oryza sativa × O. longistaminata. A cultivar sustained consecutive harvests over four years, matching annual rice yields while reducing labour by over 58 % and halving seed inputs per cycle. Continuous cropping enhanced soil organic carbon by nearly 1 Mg ha–1 yr–1, increased nitrogen accumulation, improved soil pH and boosted water-holding capacity. Broad adaptation across frost-free zones and uptake by tens of thousands of smallholder farmers illustrate its practical viability and mark a milestone in translating perennialisation into a staple-crop paradigm.

Perennial Grain Crop Development and Management publication trend

The graph below shows the total number of articles in perennial grain crop development and management across all publications each year (not limited to Nature Index journals).

Technical terms

Perennial grain: A crop that regenerates and produces harvestable yield across multiple seasons without annual replanting.

Rhizome: An underground stem that stores nutrients and supports regrowth in perennial plants.

Domestication cycle: A generation in a selective breeding programme during which individuals are chosen for traits such as yield or stress tolerance.

Dual-use crop: A plant cultivated for multiple outputs, typically both edible grain and forage or biomass.

References

1. Progress and Bottlenecks in the Early Domestication of the Perennial Oilseed Silphium integrifolium, a Sunflower Substitute. Sustainability (2018).
2. Sustained productivity and agronomic potential of perennial rice. Nature Sustainability (2022).
3. Development and Evolution of an Intermediate Wheatgrass Domestication Program. Sustainability (2018).
4. Farmer perspectives and experiences introducing the novel perennial grain Kernza intermediate wheatgrass in the US Midwest. Renewable Agriculture and Food Systems (2019).
5. Post-Harvest Management Practices Impact on Light Penetration and Kernza Intermediate Wheatgrass Yield Components. Agronomy (2021).