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Soybean reduced internode 1 determines internode length and improves grain yield at dense planting
Shichen Li1,2, Zhihui Sun1, Qing Sang1
1Guangdong Key Laboratory of Plant Adaptation and Molecular Design, Guangzhou Key Laboratory of Crop Gene Editing, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou, 510006, China.
Nature Communications
|December 1, 2023
Summary
Soybean
Area of Science:
- Plant genetics
- Crop science
- Agricultural biotechnology
Background:
- Green Revolution traits improved cereal crops but largely overlooked soybean.
- Optimizing soybean yield under dense planting requires shorter internodes without sacrificing pods.
- A novel soybean mutant, reduced internode 1 (rin1), addresses this need.
Purpose of the Study:
- To characterize the genetic basis and molecular mechanisms of the rin1 short-internode soybean mutant.
- To evaluate the yield potential of rin1 under high-density planting conditions.
Main Methods:
- Genetic characterization of the rin1 mutant.
- Analysis of protein interactions and gene regulation.
- Field trials comparing rin1 to wild-type soybean.
Main Results:
- The rin1 mutation is caused by partial loss of SUPPRESSOR OF PHYA 105 3a (SPA3a).
- RIN1 regulates internode length via interaction with STF1/STF2 and gibberellin metabolism.
- Field trials showed rin1 significantly enhanced grain yield under high-density planting.
Conclusions:
- The rin1 mutant offers a valuable genetic resource for enhancing soybean grain yield.
- RIN1 is crucial for developing improved soybean varieties for high-density cultivation and intercropping systems.
