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Identifying Soybean Germplasm with Tolerance to Dehydration and Salinity Stresses
Yong-Bi Fu1, Shanna M Quilichini2, Elroy R Cober3
1Saskatoon Research and Development Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada.
Plants (Basel, Switzerland)
|May 13, 2026
Summary
Soybean germplasm characterization identified accessions with enhanced tolerance to dehydration and salinity stress. This research aids in improving soybean genetic resources for abiotic stress resilience.
Area of Science:
- Plant genetics and breeding
- Agricultural science
- Biotechnology
Background:
- Effective management and utilization of conserved plant germplasm are crucial for crop improvement.
- Genebanks worldwide hold vast genetic resources for crops like soybean (Glycine max).
- Characterizing soybean accessions aids in identifying valuable traits for breeding programs.
Purpose of the Study:
- To characterize a diverse collection of soybean accessions for abiotic stress tolerance.
- To identify soybean germplasm with enhanced tolerance to dehydration and salinity stress.
- To evaluate the potential of conserved soybean genetic resources for crop improvement.
Main Methods:
- Laboratory seedling vigor test using polyethylene glycol (PEG)-induced dehydration stress.
- Greenhouse salinity tolerance test evaluating seed yield under saline conditions.
- Screening of 774 soybean accessions for dehydration tolerance and 72 for salinity tolerance.
Main Results:
- 95 soybean accessions exhibited vigorous seedling growth under PEG-induced dehydration stress.
- 58 accessions showed significant seed yield under severe salinity stress (ECi 16.1 dS m-1).
- One unique accession (CN29789, 'Hei Nung No.18') demonstrated high tolerance to both stresses.
Conclusions:
- Germplasm characterization is vital for unlocking the potential of conserved genetic resources.
- Identified soybean accessions provide valuable genetic material for improving abiotic stress tolerance.
- This study highlights the importance of genebank characterization for soybean genetic improvement.
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