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Targeting Low-Phytate Soybean Genotypes Without Compromising Desirable Phosphorus-Acquisition Traits.
Mireadili Kuerban1, Wenfeng Jiao1, Jiayin Pang2,3
1College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China.
Frontiers in Genetics
|December 31, 2020
Summary
Soybean genotypes show varied seed phytate-phosphorus (P) levels. Researchers identified low phytate soybean lines with traits for efficient P acquisition, crucial for improving animal feed and reducing environmental P loss.
Area of Science:
- Agricultural Science
- Plant Breeding
- Biochemistry
Background:
- Phytate-phosphorus (P) is poorly utilized by humans and livestock, leading to environmental P pollution.
- High P-acquisition efficiency in crops aids soil P access, but its link to seed phytate concentration is unclear.
Purpose of the Study:
- To screen soybean genotypes for seed phytate-P concentration and P-acquisition traits.
- To investigate the relationship between seed phytate-P concentration and root traits for P acquisition.
Main Methods:
- Screened 256 soybean genotypes for seed phytate-P concentration.
- Evaluated root morphological and physiological traits in low-P soil.
- Analyzed rhizosheath carboxylates and acid phosphatase activity.
Main Results:
- Significant genotypic variation in seed phytate-P concentration (0.69-5.49 mg P g⁻¹ dry weight) and P-acquisition traits.
- No correlation found between seed phytate-P concentration and desirable root traits for P acquisition.
- Identified two soybean genotypes with low phytate and high P-acquisition traits.
Conclusions:
- Soybean genotypes exhibit diverse seed phytate-P levels and P-acquisition capabilities.
- Low seed phytate concentration is not associated with enhanced P-acquisition root traits.
- Identified soybean germplasm provides a basis for breeding low phytate-P varieties.
