New Rice Genes Identified for Cold Stress Tolerance
Researchers mapped 74 genetic regions to enhance root growth, providing new targets for cold-resilient crop development.
Updated on Oct. 22, 2026 in Botany
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Researchers have identified 74 candidate genes associated with root system architecture in rice that may improve cold tolerance. This discovery comes from a genomic analysis of 204 diverse rice varieties conducted under both controlled cold-stress and standard greenhouse conditions.
Why it matters
Identifying specific genomic regions for root development helps plant breeders develop rice strains capable of surviving cooler climates. This research provides a new set of genetic targets for enhancing crop resilience in regions prone to temperature volatility.
The study analyzed 204 rice germplasms using 854,832 polymorphic SNPs to pinpoint 143 QTNs. These results identified 74 candidate genes within a 100 kb genomic range, including OsBRD1 and OsSWEET3a, which are linked to root system architecture traits.
The details
Researchers utilized the FarmCPU model within the rMVP package to perform a Genome-Wide Association Study (GWAS) — a method that identifies genetic variations associated with specific traits by scanning entire genomes. Plant biomass and root system architecture (RSA) traits were measured using WinRhizo Pro, a specialized software for digital root analysis. These data points were cross-referenced with gene expression profiles to determine which of the 74 identified candidate genes influence root growth under cold stress.
Timeline
Weeks 1-2: Rice plants were subjected to a 10 °C environment in a growth chamber.
Weeks 3-4: The growth chamber temperature was adjusted to 17 °C.
Four weeks after planting: 2,448 roots were harvested for measurement.
The Tech Race
This research builds upon existing genomic frameworks to isolate specific root-growth genes, accelerating the move from broad breeding strategies to precision genetic targeting. It aligns with efforts to expand rice cultivation into higher latitudes and cooler environments by hardening crop physiology at the seedling stage.
This research provides a foundational dataset for agricultural scientists and seed developers working to produce cold-resistant rice cultivars. While these findings represent a research-stage advance, they offer clear genetic markers that breeders can use in future crop selection programs.
The takeaway
The study offers a precise roadmap of genetic markers that influence how rice roots handle cold stress. Future progress depends on whether these 74 candidate genes perform effectively when introduced into commercial rice strains via CRISPR or traditional breeding markers.
Further reading
Explore the latest developments in plant genetics at Botany.
More information
Review the technical findings in the peer-reviewed research article.
Source note: This article includes information reported by Nature.
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