Varietal Differences of Seed Weight, Protein and Sulfur-containing Amino Acid Content of Soybean Seeds

[摘要] Investigations have been carried out to determine the varietal differences on the seed weight (dry weight), protein content (moisture free basis) and sulfur-containing amino acid content in protein (N×6.25) of 1110 samples of soybean seeds grown at Kariwano Akita in 1970. On all the samples, the range, mean value and coefficient of variation of seed weight and chemical constituents were as follows: weight of 100 seeds 2.6 g to 47.0 g, 20.4 g, 35.59%, protein 29.81% to 53.29%, 39.82%, 7.71%, methionine 0.78% to 1.34%, 1.03%, 9.71%, cystine 0.85% to 2.36%, 1.40%, 17.14% and total sulfur-containing amino acids (methionine-cystine) 1.66% to 3.52%, 2.43%, 11.93%. As compared with the value of previous paper, it was observed that the results were low in the mean value of protein content, and high in the coefficient of variation of cystine content. On the mean value of each group divided by the place of origin of the variety, weight of 100 seeds was the smallest in Southeast Asia (10.0 g) and the largest in Tohoku (24.2 g). Protein content was the lowest in Europe (35.98%) and the highest in Southeast Asia (43.35%). Methionine content was the lowest in Chugoku (0.93%) and the highest in Southeast Asia (1.14%). Cystine content was the lowest in Hokkaido (1.32%) and the highest in Europe (2.02%). The content of total sulfur-containing amino acids was the lowest in Chugoku (2.30%) and the highest in Europe (3.13%). With regard to the correlation between varietal characters and weight of 100 seeds or chemical constituents in all samples, the date of maturity and growing period had a positive correlation with weight of 100 seeds, and negative correlations with methionine, cystine and total sulfur-containing amino acids content weight of 100 seeds was negatively correlated with methionine, cystine and total sulfur-containing amino acids content. On the other hand, a low positive correlation was shown between weight of 100 seeds and protein content. On the chemical constituent pairs, protein content was negatively correlated with methionine, cystine and total sulfur-containing amino acids content. Positive correlations were observed between sulfur-containing amino acid pairs.

[学科分类] 农业科学（综合）