【摘要】 本文分析了栽培、野生、半野生大豆及天然杂交种种子蛋白质含量及其氮基酸组成。 种子蛋白质含量平均以野生大豆最高,栽培大豆最低,半野生大豆和天然杂种的蛋白质含量相似,介于栽培和野生大豆之间。 大豆种子蛋白质的氨基酸组成比较齐全,硫氨基酸(胱氨酸、蛋氨酸)含量较低。大豆类型间含硫氨基酸含量差异不明显。栽培大豆的天冬氨酸和苯丙氨酸含量显著高于野生大豆,而组氨酸和精氨酸含量显著低于野生大豆。 大豆种子蛋白质含量与含硫氨基酸含量呈显著的负相关。因而在提高蛋白质含量的同时提高含硫氨基酸含量是困难的。但大豆品种(品系)间含硫氨基酸含量差异较大,筛选含硫氨基酸含量高的资源是有可能的。 高纬度地区栽培大豆蛋白质含量低于低纬度的大豆。野生大豆则相反,高纬度地区野生大豆蛋白质含量高于低纬度地区野生大豆。更多还原

【Abstract】 The mean protein content of seeds and amino acid composition of seed protein in cultivated, semi-cultivated and wild soybeans were determined in 1982. 50 cultivars of cultivated soybean, 21 lines of semi-cultivated soybean, 41 lines of wild soybean and 17 lines of progenies of natural crossing were used in this research.The mean of protein content of cultivated, semi-cultivated and wild soybeans were 39.12%, 39.97% and 41.04% respectively. The difference of protein content between wild and cultivated soybeans was statistically significant at the 10% level.Similarity in the pattern of amino acid composition was found among cultivated, semi-cultivated and wild soybeans. As shown in table 2, no significant differences were found in the content of amino acid among types of soybeans except aspartic acid, phenylalanine, histidine and arginine. Methionine and cystine contents showed relatively wide range of value and high coefficien of variation.With regard to the correlation between protein content and amino acid in all types of soybeans, there were negative correlation between most amino acid composition and protein content, especially there were highly significant negative correlation between sulfer-containing amino acid (methionine and cystine) content and protein content in all types of soybeans.更多还原