栽培大豆含硫氨基酸及蛋白质含量的初步分析

CONTENT OF SULFER-CONTAINING AMINO ACID AND PROTEIN IN CULTIVATED SOYBEANS

测定了全国24个省市自治区的1004份大豆品种的蛋白质及含硫氨基酸含量。相关统计表明:大豆子粒含硫氨基酸与蛋白质含量呈显著负相关,因而在提高蛋白质含量的同时提高含硫氨基酸的含量是困难的。但从本研究中可看出:大豆品种之间含硫氨基酸含量变辐及变异较大,胱氨酸范围为1.08～1.70(g/16gH),变异系数为7.94(C·V%),蛋氨酸范围为0.93～1.65(g/16gN)变异系数为9.30(C·V%),所以,筛选出含硫氨基酸含量较高的种质资源还是可能的。通过不成对数据的平均数的t值测验,进一步证明了不同省区间大豆的蛋白质、胱氨酸和蛋氨酸含量,因受其不同地理环境和气候条件的影响存在显著差异。高纬度地区大豆蛋氨酸含量高于低纬度地区,蛋白质和胱氨酸含量则有相反趋势。

The protein content and sulfer-containing amino acid content of seed protein in 1004 soybean cuhivar were detected.There were highly significant negative correlation between sulfer-containing amino acid and protein content of soybean seeds. It seems difficult to enhance both protein and sulfer-containing amino acid content. However, the range and c. v of sulfer-containing amino acid content among different cultivars were quite wide (1.08-1.79g/16gN, c. v. 7.94% for cystine, 0.93-1.65g/16gN, c. v9.30% for methionine)and screening germplasm resources of high content of sulfer-containing amino acid seems to be possible.T test of mean of unpaired data illustrated that the contetnts of protein, cystine and methienine were varied becouse of different environment. Methionine content of soybean in high latitude area was higher than that of low latitude area. Conversely, protein and cystine contents in high latitude area were lower than that of low latitude area.