Quality of Canadian food-type soybeans 2013

Canadian natto-type soybeans

Mean 100-seed weight for 2013 natto-type soybean was 7.6 g, which was lower than the mean for 2012. Water absorption value was 1.12 g H2O per g seeds, which was slightly lower than the value for 2012. Nitrogen solubility index was 81.8% for, which was lower than the index for 2012 (85.7%).

The mean protein content for 2013 Canadian natto-type soybean was 41.7 g per 100 g dry matter, which was lower than the mean for 2012 (43.7 g per 100 g dry matter). The mean oil content was 18.8 g per 100 g dry matter, which was similar to the mean for 2012 (18.7 g per 100 g dry matter).

The mean sucrose content for 2013 Canadian natto-type soybean was 64.4 g per kg dry matter, which was higher than the mean for 2012 (54.3 g per kg dry matter). The mean oligosaccharides content for 2013 was 45.2 g per kg dry matter. This was higher than the mean for 2012 (43.7 g per kg dry matter).

The mean total isoflavones content in 2013 Canadian natto-type soybean was 3084 mg per kg dry matter, which was higher than the mean for 2012 (2242 mg per kg dry matter).

Quality data for 2013 Canadian natto-type soybean compositesFootnote 1

Quality parameter 2013 2012
Physical characteristic
100-seed weight,g/100 seeds 7.6 9.2
Water absorption,g H2O/g seeds 1.12 1.28
Nitrogen solubility index (NSI), % 81.8 85.7
Chemical composition (g/100g DM)
Protein content 41.7 43.7
Oil content 18.8 18.7
Sugar content (g/kg DM)
Sucrose 64.4 54.3
Raffinose 6.3 6.5
Stachyose 38.6 36.7
Verbascose 0.30 0.52
Total oligosaccharidesFootnote 2 45.2 43.7
Isoflavones (mg/kg DM)
Total isoflavonesFootnote 3 3084 2242

Footnotes

Footnote 1

Soyean, No. 1 Canada and No. 2 Canada combined.

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Footnote 2

Sum of raffinose, stachyose and verbascose.

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Footnote 3

Sum of isoflavone aglycones (daidzein, genistein and glycitein), glucosides, malonyl glucosides and acetyl glucosides.

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