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采用南方3769份夏大豆地方品种按省分层随机抽样所得143份材料在南京两年三重复试验结果,按三个优蛋白(胱氨酸组分、甲硫氨酸组分、含硫氨基酸组分)性状值高低,剖分出相应的三个蛋白特异群体及地方群体。判别分析得到,高胱氨酸、高甲硫氨酸、高含硫氨基酸等三个特异群体由农艺性状构成的19个简易判别函数中,有17个与经济系数或粒茎比有关。三个优蛋白性状与经济系数或高粒茎比密切相关。选择高经济系数或高粒茎比后,胱氨酸组分及含硫氨基酸组分间接地显著相对提高5～7％,甲硫氨酸组分略有增加。由此建议高经济系数或高粒茎比,可作为优蛋白资源的田间筛选指标。在资源评价中可考虑经济系数或粒茎比作为鉴定指标之一。
A total of 143 samples obtained from random sampling of 3769 summer soybean cultivars in southern China were analyzed in three years in Nanjing for three replicates. According to the results of three excellent proteins (cystine, methionine and sulfur-containing amino acids Points) character traits, the corresponding three specific protein groups and local groups. Among the 19 simple discriminant functions of agronomic traits obtained from discriminant analysis, three specific groups of homocysteine, homomethionine, and high-sulfur-containing amino acids, 17 were related to economic coefficient or grain-stem ratio. Three excellent protein traits are closely related to economic factors or high stalk ratio. After selecting high economic coefficient or high stalk ratio, the contents of cystine and sulfur-containing amino acids increased significantly by 5 ~ 7% and methionine increased slightly. Therefore, it is suggested that high economic coefficient or high grain-stem ratio can be used as a field screening index for the optimal protein resources. Economic evaluation of resources or grain stem ratio can be considered as one of the indicators.