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Multiple Cold Tolerance Trait Phenotyping Reveals Shared Quantitative Trait Loci in Oryza sativa
Naoki Shimoyama1, Melineeh Johnson1, André Beaumont1
1Department of Biological Sciences, Marquette University, Milwaukee, WI, 53233, USA.
Rice (New York, N.Y.)
|August 16, 2020
Summary
Developing chilling tolerant rice (Oryza sativa) is crucial for crop improvement. This study identified key genes and pathways, like Golgi-mediated transport, involved in cold stress tolerance.
Area of Science:
- Plant genetics
- Crop science
- Molecular biology
Background:
- Developing chilling tolerant rice (Oryza sativa) is vital for crop improvement.
- Understanding chilling tolerance mechanisms in rice is limited.
- Comparing Japonica and Indica subspecies offers insights into cold stress responses.
Purpose of the Study:
- Investigate chilling tolerance traits in Oryza sativa.
- Identify genetic loci (QTL) associated with chilling tolerance.
- Elucidate molecular pathways conferring cold stress tolerance.
Main Methods:
- Utilized the Rice Diversity Panel 1 (RDP1) for analysis.
- Conducted genome-wide association studies (GWAS) on 354 rice accessions.
- Analyzed Gene Ontology (GO) terms and pathways for enriched functions.
Main Results:
- Identified 500 quantitative trait loci (QTL) for chilling tolerance traits.
- Discovered 178 unique QTL across 25% of the rice genome.
- Enriched GO terms included carbohydrate biosynthesis, transport, and Golgi apparatus functions.
Conclusions:
- Golgi-mediated transport and carbohydrate metabolism are key to rice cold stress tolerance.
- Subcellular and extracellular vesicle transport contribute to homeostasis under chilling stress.
- Signal transduction pathways are implicated in rice chilling tolerance.
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