Journal
AGRICULTURE-BASEL
Volume 11, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/agriculture11080735
Keywords
soybean germplasm; protein content; isoflavone content; daidzein; glycitein; genistein
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Funding
- Chungbuk National University
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This study investigated the protein and isoflavone contents of 300 soybean germplasms from different countries, with findings showing variations both in terms of country of origin and size/color. Protein content was highest in soybeans from Korea, while total isoflavone content was highest in soybeans from Japan. Positive correlation was found among daidzein, glycitein, and genistein isoflavone contents, with a low negative correlation between total isoflavone and protein content.
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 mu g g(-1) to 3561.8 mu g g(-1), with an average of 888.8 mu g g(-1). In the comparison of isoflavone content according to country, the highest average content was shown in soybeans from Japan (951.3 mu g g(-1)), followed by the USA (918.7 mu g g(-1)), Korea (902.2 mu g g(-1)), North Korea (870.0 mu g g(-1)) and Russia (710.6 mu g g(-1)). Daidzein, glycitein and genistein isoflavone contents were positively correlated, while total isoflavone and protein showed a low negative correlation.
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