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An α/β-Hydrolase GmABHD6 Controls Seed Oil Content and Yield in Soybean
Kaixin Yu1, Limin Hu1, Bo Sun1
1National Key Laboratory of Smart Farm Technology and System, National Research Center of Soybean Engineering and Technology, Northeast Agricultural University, Harbin, Heilongjiang, China.
Plant Biotechnology Journal
|November 17, 2025
Summary
Researchers identified GmABHD6 as a key gene regulating soybean seed oil content. This gene negatively impacts oil accumulation, with variations linked to soybean domestication and breeding improvements.
Area of Science:
- Plant genetics
- Molecular biology
- Agricultural science
Background:
- Seed oil content is a crucial trait in soybean breeding.
- The genetic underpinnings of seed oil content are not fully understood.
Purpose of the Study:
- To identify the gene responsible for a major quantitative trait locus (QTL) affecting soybean seed oil content.
- To elucidate the regulatory mechanisms and evolutionary significance of this gene.
Main Methods:
- Fine-mapping of a QTL in soybean populations.
- Functional analysis using gene overexpression and editing.
- Transcriptomic and metabolomic profiling.
- Analysis of transcription factor binding and population genetics.
Main Results:
- GmABHD6 was identified as the causal gene for seed oil content QTL on chromosome 16.
- Overexpression of GmABHD6 decreased oil content; gene editing increased it, showing pleiotropic effects on seed traits.
- GmERF transcription factor regulates GmABHD6 expression.
- Strong selection signatures at the GmABHD6 locus indicate its role in soybean domestication.
Conclusions:
- GmABHD6 negatively regulates soybean seed oil content and is a domestication-related gene.
- Understanding GmABHD6 provides insights into soybean seed composition, yield, and evolution.
