Variation in Protein and Isoflavone Contents of Collected Domestic and Foreign Soybean ( Glycine max (L.) Merrill) Germplasms in Korea

Ji-Seok Lee, Hong-Sig Kim and Tae-Young Hwang
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Ji-Seok Lee: Department of Crop Science, College of Agriculture, Life Science and Environmental Chemistry, Chungbuk National University, Cheongju 28644, Korea
Hong-Sig Kim: Department of Crop Science, College of Agriculture, Life Science and Environmental Chemistry, Chungbuk National University, Cheongju 28644, Korea
Tae-Young Hwang: Department of Crop Science, College of Agriculture, Life Science and Environmental Chemistry, Chungbuk National University, Cheongju 28644, Korea

Agriculture, 2021, vol. 11, issue 8, 1-11

Abstract: This study was carried out to investigate the variations in protein and isoflavone contents of 300 soybean germplasms introduced from domestic and foreign countries and to compare their contents in terms of size, colour and country of origin. The protein content ranged from 28.7 g 100 g − 1 to 44.5 g 100 g − 1 , with an average of 39.0 g 100 g − 1 . In a comparison of protein according to country of origin, the highest content was seen in soybeans from Korea (39.7 g 100 g − 1 ), followed by North Korea (39.2 g 100 g − 1 ), China (39.0 g 100 g − 1 ), Japan (38.8 g 100 g − 1 ), the USA (38.0 g 100 g − 1 ) and Russia (37.2 g 100 g − 1 ). The total isoflavone content ranged from 207.0 µg g −1 to 3561.8 µg g −1 , with an average of 888.8 µg g −1 . In the comparison of isoflavone content according to country, the highest average content was shown in soybeans from Japan (951.3 µg g −1 ), followed by the USA (918.7 µg g −1 ), Korea (902.2 µg g −1 ), North Korea (870.0 µg g −1 ) and Russia (710.6 µg g −1 ). Daidzein, glycitein and genistein isoflavone contents were positively correlated, while total isoflavone and protein showed a low negative correlation.

Keywords: soybean germplasm; protein content; isoflavone content; daidzein; glycitein; genistein (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
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