Background

Global warming and extreme weather events are shaking the foundations of the world's food production systems. Environmental stresses such as drought, extreme heat, and soil salinity significantly reduce the productivity of major cereal crops every year. While traditional breeding methods have driven variety improvement for ages, they are limited by genetic linkage, which causes undesirable traits to be introduced along with useful ones, and the process of crossing and selection takes at least several to over a decade.

A serious problem is the narrowing of genetic diversity due to modern agriculture's excessive reliance on a few major crops. Crops domesticated by humanity over thousands of years have lost much of their genetic defense mechanisms for surviving harsh wild environments, as they were selected for yield and processing convenience. In contrast, wild relatives and plants growing in barren lands retain robust survival systems that maintain photosynthesis and preserve moisture even under extreme dryness and high heat.

Researchers have focused on the toughness of wild plants, but finding which factors drive stress resistance and yield increase within their vast genomes was like finding a needle in a haystack. Furthermore, there was a lack of precision technology to safely and quickly apply these traits to actual crops at the speed required by farmers and industry. Accordingly, there was an urgent need for a new technological breakthrough to decode the wisdom of molecular evolution inherent in rugged wild plants and directly introduce it into modern crops.

Key Findings

Wild Bioscience, a biotechnology startup spun out from the University of Oxford, approached this challenge with an original platform combining evolutionary genomic information of wild plants with precision gene editing technology. Nature Biotechnology highlighted them as a promising company opening new horizons for climate-adaptive agriculture after they successfully secured large-scale early-stage investment.

The core methodology begins with analyzing the genomic big data of wild plants that have adapted to extreme environments over hundreds of millions of years using AI-based computational biology models. The research team identified key gene regulatory regions in wild plants that maximize photosynthetic efficiency and water-use efficiency. By comparing and analyzing the transcriptomes and genomic sequences of tens of thousands of non-crop wild plant species, they selected switch genes directly involved in crop productivity.

While existing crop genetic modification technology relied on transformation (LMO) methods that randomly insert foreign genes, these employ precision gene editing techniques, including CRISPR-Cas. Without introducing foreign DNA, they fine-tune the expression levels and timing of inherent genes in commercial crops such as soybeans and wheat to match optimized forms found in wild plants.

This approach enabled precise calibration of chloroplast positioning within plant leaves and the stomatal opening/closing mechanism. They implemented a crop phenotype that maintains a stable CO2 uptake rate while suppressing leaf water loss even in drought environments. In controlled growth chambers and preliminary greenhouse tests, biomass accumulation and carbon fixation efficiency under stress conditions showed significant improvement compared to the control group.

Significance and Outlook

This research and commercialization attempt hold extraordinary value in that they expanded the focus of plant genetics from standard greenhouse crops to all wild plants on Earth. By redesigning crops using wild genotypes validated in harsh natural environments as a blueprint, it presents the possibility of establishing a sustainable foundation for food production amidst the climate crisis. In particular, it is proving that gene editing technology can successfully handle polygenic complex traits, such as photosynthetic efficiency and environmental resilience, beyond simple disease resistance.

Changes in the global regulatory environment also contribute to a brighter outlook for their commercialization. A trend is spreading among the US, UK, Japan, and major South American countries to classify gene-edited crops without foreign DNA as non-regulated products. Accordingly, they are expected to enter the seed market much faster than traditional GMO crops, which require enormous costs and long regulatory approval periods.

However, the practical challenges to be overcome are clear. It must be verified whether the achievements gained in controlled greenhouses and test cultivation sites can be consistently reproduced in actual large-scale open-field farmlands with varying soil conditions and climates. It must also be closely examined whether a tradeoff phenomenon occurs, where crops expend excessive energy on defense mechanisms, potentially leading to a decrease in seed yield under complex stress environments. Additionally, overcoming conservative gene-editing regulatory barriers in some regions, including the European Union, will be a critical test for establishing a presence in the global market.