Perennial grains

01Overview and value chain

Markers: [EC: Farm to Fork Strategy | OECD: Agricultural biotechnology | Regulator: USDA-APHIS (USA), EPA (USA), EFSA (EU)]

Perennial grains represent a fundamental redesign of global agriculture, transitioning from annual tillage-dependent systems to crops that remain in the soil year after year. By establishing deep, persistent root systems, perennial crops like Kernza (intermediate wheatgrass) and perennial rice drastically reduce soil erosion, minimize nitrogen leaching, and significantly enhance carbon sequestration. Unlike annuals that require vast inputs of synthetic fertilizers, fuel, and labor every spring, perennial grains can maintain productive yields for 3 to 5 years from a single planting. While early generations of these crops faced challenges with grain size and harvestable yield compared to their highly domesticated annual counterparts, advanced genomic mapping and accelerated breeding have rapidly closed this gap. Adopting perennial grains on even 10 percent of global arable land could fundamentally shift agriculture from a net carbon emitter to a massive carbon sink.

The key directions of perennial grains are:

1. De Novo Domestication: Taking wild perennial species (such as intermediate wheatgrass) and breeding them over generations for larger seed size, non-shattering heads, and higher yields.
2. Wide Hybridization: Crossing high-yielding annual crops (like modern wheat or rice) with wild perennial relatives to transfer the perenniality traits into staple food crops.
3. Agronomic Optimization: Developing entirely new field management systems for harvesting, weed control, and nutrient application in fields that are never tilled.
4. Supply Chain Commercialization: Building specialized milling, processing, and consumer product pipelines (e.g., brewing and baking) adapted to the unique nutritional and physical profiles of perennial grains.

Sectoral value chain

[Germplasm Collection] ──> [Genomic Breeding] ──> [Field Agronomy] ──> [Harvest & Milling]
                                  │
                          (Soil Sequestration)
                                  │
                                  ▼
[Consumer Products] <─── [Supply Chain Integration] <─────┘

Value chain levels

Cross-cutting technologies of the sector:

• Genomic Selection (GS): Sequencing the genomes of thousands of plants to predict their mature traits while they are still seedlings.
• Isotope Tracing: Using stable isotopes to measure exactly how much carbon perennial root systems deposit deep into the soil profile.
• Food Extrusion & Processing: Modifying food engineering techniques to utilize the unique gluten and starch profiles of novel grains like Kernza.

02US

The United States is the epicenter of perennial grain commercialization, driven by deep philanthropic research backing and aggressive adoption by forward-thinking consumer brands.

Kernza Pioneer, Corporate Backing, Regenerative Supply

• The Land Institute: The undisputed pioneer in this space, driving the domestication of Kernza and perennial sorghum through decades of open-source breeding.
• Brand Adoption: Major companies like General Mills and Patagonia Provisions have heavily subsidized the market, incorporating Kernza into cereals and craft beers to generate market pull.
• Scaling Infrastructure: Startups like Sustain-A-Grain provide the critical middle layer, distributing elite seeds to farmers and aggregating the harvest to ensure reliable supply for commercial buyers.

03CN

China leads the world in the successful field-scale deployment of perennial grains, particularly focusing on food security and reducing labor inputs in rice cultivation.

Perennial Rice, Labor Reduction, State Support

• Yunnan University: Developed the globally recognized Perennial Rice 23 (PR23) by crossing cultivated Asian rice with an African perennial relative.
• Commercial Deployment: PR23 is now planted across tens of thousands of hectares in southern China, yielding multiple harvests from a single planting and drastically cutting farmer labor costs.
• Food Security Mandates: The central government heavily supports these initiatives as they stabilize yields on marginal lands while preventing soil degradation and nutrient runoff.

04EU

The European Union focuses on integrating perennial grains into strictly regulated sustainable farming systems, emphasizing biodiversity and climate resilience over sheer yield.

NUCNet, Heritage Grains, Agroecology

• Collaborative Research: Institutions like SLU (Sweden) and The James Hutton Institute (UK) lead pan-European networks like NUCNet to adapt perennial cereals to northern climates.
• Agroecological Focus: European research strongly emphasizes growing perennial grains in polycultures (e.g., intercropped with clover or alfalfa) to eliminate the need for synthetic nitrogen.
• Supply Chain Coalitions: Organizations like Axfoundation partner directly with researchers and bakers to test the commercial viability and consumer acceptance of perennial wheat relatives.

05Leading companies and research institutes

06Tech stack and innovations

The transition from wild grasses to viable commercial staples relies heavily on molecular genetics to compress thousands of years of traditional domestication into a single decade.

1. Genomic Selection and Marker-Assisted Breeding:
   • Sequencing wild perennial genomes to identify the specific loci responsible for rhizome persistence and winter survival.
   • Using high-throughput DNA screening to select seedlings for non-shattering seed heads and free-threshing hulls without waiting years for the plants to mature.
2. Agronomic Data Modeling:
   • Deploying soil sensors to track nitrogen fluxes and deep-soil carbon deposition, proving the ecological ROI of perennial systems.
3. Food Science & Rheology:
   • Analyzing the protein structures of novel grains to develop specialized milling profiles that allow them to be baked or brewed efficiently despite differing from standard annual wheat.

07Value chains and production pipelines

Industrial pipeline of perennial grain commercialization (ISO/IEC standards)

┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Genomic Selection      │ ───> │ 2. Multi-Year Field Trial │
└───────────────────────────┘      └───────────────────────────┘
                                                 │
                                                 ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Farm Cultivation       │ <─── │ 3. Foundation Seed Mult.  │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Aggregation & Milling  │ ───> │ 6. CPG Manufacturing      │
└───────────────────────────┘      └───────────────────────────┘

Stage 1: Genomic Selection

Researchers utilize extensive genome-wide association studies (GWAS) to select breeding lines of intermediate wheatgrass or rice that combine high seed weight with strong perennial root traits.

Stage 2: Multi-Year Field Trial

The selected lines are planted across diverse agro-climatic zones. Unlike annuals, these trials must run for 3 to 5 years to accurately measure yield persistence and long-term soil health impacts.

Stage 3: Foundation Seed Mult.

Once a stable, high-yielding cultivar is established, agricultural startups or university extensions multiply the foundation seed to produce enough volume for commercial farming.

Stage 4: Farm Cultivation

Farmers plant the seeds using modified no-till drills. For the next several years, farm management shifts from planting and plowing to precise weed management and staggered harvesting.

Stage 5: Aggregation & Milling

Harvested grains are often smaller and retain their hulls more tightly than annual wheat. Specialized aggregation facilities de-hull, clean, and mill the grain to meet food-grade standards.

Stage 6: CPG Manufacturing

Consumer Packaged Goods (CPG) companies formulate the perennial flour or whole grains into premium products, leveraging the grain’s ecological story to attract climate-conscious consumers.