Choosing Wheat Varieties for Climate Resilience

How to strengthen your cropping system in volatile seasons.

Another dry spring has reminded everyone that seasons are not behaving as they once did. Whether you frame it as climate change or simply increasing weather volatility, the effect on crops is visible.

You cannot control rainfall or temperature swings. You can control the starting point of your crop. That starting point is variety choice.

Selecting the right wheat variety does more than influence yield. It shapes disease risk, input strategy, drilling flexibility and how exposed you are when conditions turn against you.

Variety choice fixes the framework for the season

When you choose a variety, you are effectively setting the management direction for the year.

Professor Mario Caccamo, CEO of NIAB, describes variety selection as a decision that “fixes many other management choices later down the line”. Genetics determine the resistance base you are working with. Everything else builds on that.

Your variety influences:

• Septoria resilience
• Yellow rust exposure
• Brown rust pressure
• Mildew risk
• Response to drilling date
• Input requirement

That is why resilience starts here. But genetics are not a standalone solution.

Yellow rust shows how quickly resistance can shift

Recent seasons have highlighted how quickly pathogen populations can change. YR15 yellow rust strains have reduced resistance scores across many Recommended List varieties.

This is not a failure of breeding. It is a reminder that single-gene resistance is vulnerable. Breeders are increasingly stacking multiple resistance genes to strengthen durability, but adaptation takes time.

Wheat breeder Bill Angus has pointed out that the UK has only begun to explore the full genetic variability available within wheat. There is scope for broader diversity in breeding programmes, particularly if assessment systems allow more flexibility.

Gene editing will contribute to that future. UK regulation is moving towards proportionate oversight, enabling innovation while maintaining safety. Conventional breeding still offers significant untapped diversity.

Yield matters, but it cannot be the only metric

Global demand for food remains high. More than 800 million people are affected by hunger worldwide. UK growers operate in one of the most capable arable systems globally.

Productivity matters.

“We have a moral obligation to produce more, not less.”

Bill Angus

That obligation does not sit in isolation from resilience. High output and robust genetics need to sit together. Selecting purely on headline yield without considering resistance profile increases exposure.

Avoiding habitual variety decisions

It is easy to repeat what worked last season. That approach carries risk.

“Each season is different and will play to the strengths of certain varieties in one year, but not in the next.”

John Miles, Agrii

Block cropping has become more common due to grain storage and marketing logistics. Larger areas of single varieties reduce genetic spread. When conditions shift, exposure increases.

Diversification within wheat groups and across rotations strengthens resilience. In some situations, it may also mean considering crops outside the usual comfort zone. Forage oats, cowpea and durum wheat are examples that can be worth horizon scanning where markets align.

The principle remains straightforward: right crop, right place, right agronomy.

Thinking beyond the Recommended List

The Recommended List provides essential guidance. It does not replace local knowledge and trial insight.

Fitzroy is a useful example.

While many varieties have shown reduced yellow rust resilience this year, Agrii trials show Fitzroy has remained comparatively robust, largely due to its parent Evolution.

Fitzroy disease scores

• Yellow rust: 5.8 (hard feed sector)
• Brown rust: 4.0
• Mildew: 5.7
• Septoria: 7.3

Septoria resistance should remain central to selection decisions.

Fitzroy trial highlights

• 22.14% plant population reduction over winter at Compton (indicating good winter hardiness)
• Strong early biomass accumulation
• 105.6% of controls in long-term Agrii yield data
• Comparable performance to SY Insitor (105.6%)
• Close behind Champion (107.5%)

Performance in AICC trials and Dyson Farming Research work has reinforced its consistency, particularly under lower-input scenarios.

Fitzroy is not an all-rounder. It needs correct placement. Where the fit is right, it delivers. Our role is to help you identify that fit.

Genetics needs to align with agronomy

Genetic resilience supports crops through sustained pressure. It is less effective when sudden in-season stress occurs.

Blackgrass management has delayed drilling across many farms. That compromises optimal establishment windows. Crop stress can begin before disease pressure even builds.

This is where integrated trials matter. At Agrii, we assess varieties under multiple management regimes:

• High input protection
• Reduced input strategies
• Untreated comparisons
• Integration with biological products

Understanding where a variety performs strongly, and where it is exposed, allows you to match genetics to risk.

The role of biological products

Biostimulants, elicitors and endophytes are being evaluated alongside conventional chemistry. They are not direct replacements for fungicides.

If your aim is to reduce synthetic inputs, the variety must carry sufficient resistance to support that approach. Input strategy and genetics need to be aligned from the outset.

Start with your objective. Then choose the variety.

Food and feed safety still sets the boundary

Complete reliance on genetics without crop protection increases exposure to ergot and mycotoxins. That compromises food and feed safety.

Protecting UK production includes protecting quality and compliance. Resilience is built through sound decisions, not by removing safeguards without a viable alternative.

What comes next in breeding

Artificial intelligence is already being integrated into plant breeding.

By combining AI with molecular tools, breeders can analyse larger datasets, identify promising crosses more efficiently, accelerate variety development and respond more quickly to emerging threats.

The speed of progress is likely to increase over the next decade. That will benefit growers, provided variety selection remains grounded in field data and practical placement.

Practical steps you can take this season

• Review untreated disease data alongside treated yields
• Match resistance profile to intended input intensity
• Avoid over-reliance on a single variety
• Consider drilling flexibility and stress tolerance
• Align genetics with your blackgrass strategy
• Discuss placement scenarios before seed ordering

Resilience is built through deliberate selection, informed trials and aligned agronomy.

If you would like to review placement options or discuss trial results relevant to your region, speak to your Agrii agronomist.