Speed vernalization to accelerate generation advance in winter cereal crops

Area of Science:

• Agricultural Science
• Plant Biology
• Crop Breeding

Background:

• Crop generation time is a major bottleneck in developing high-yielding, nutritious varieties for changing environments.
• Speed breeding protocols have shortened timelines for many crops, but winter crops with vernalization requirements remain slow.
• Vernalization, a cold-induced developmental process, typically requires 6-10 weeks, delaying research and breeding.

Purpose of the Study:

• To investigate and accelerate the vernalization process in winter crops.
• To reduce the overall generation time for winter wheat and winter barley.
• To enable faster research and breeding for essential winter crop varieties.

Main Methods:

• Testing various environmental conditions and protocols to speed up vernalization.
• Implementing a specific method involving seed exposure to extended photoperiods (22h light:2h dark) at 10°C.
• Integrating the accelerated vernalization with existing speed breeding conditions.

Main Results:

• A novel speed vernalization protocol was identified, significantly reducing the time needed for winter crop development.
• This method allows for up to five generations per year for winter wheat (Triticum aestivum) and winter barley (Hordeum vulgare).
• This contrasts sharply with the typical two generations achievable under standard conditions.

Conclusions:

• The developed speed vernalization protocol dramatically shortens generation cycles for winter crops.
• This breakthrough has significant potential to accelerate plant research and breeding outcomes.
• Faster breeding cycles are essential for developing resilient and productive crops for future environmental challenges.