分析不同品系羊肚菌菌株的氨基酸组成,探讨其营业价值。以20个不同品系羊肚菌菌株为实验材料,采用氨基酸自动分析仪测定氨基酸含量,通过氨基酸评分(AAS)、化学评分(CS)、必需氨基酸指数(EAAI)等多个指标对其营养价值进行评价。结果表明,羊肚菌必需氨基酸种类齐全,呈味氨基酸和药用氨基酸含量丰富,鲜甜味氨基酸占比大;亮氨酸、赖氨酸、蛋氨酸+胱氨酸在羊肚菌样品中表现相对不足,为羊肚菌的第一限制氨基酸。氨基酸总量与各类别氨基酸相关性极显著,但与蛋白质营养价值显著性不相关;通过聚类分析,样品可分为两大类,第一类为高质蛋白品系,第二类为营养较差品系。该研究结果为羊肚菌育种和产品开发提供了良好的理论参考。
To analyze the amino acid composition of Morchlla and evaluate its nutritional value, 20 different strains of Morchlla were used. The amino acid was determined by automatic analysis instrument, and amino acid score (AAS), chemical score (CS), essential amino acid index (EAAI) were calculated. The results showed that essential amino acids were abundant in variety, the content of flavor amino acid and medicinal amino acids was rich, and the proportion of fresh sweet amino acids was large. The AAS and CS showed that the first limited amino acid of Morchlla was leucine, lysine, methionine and cystine. The total amino acids were highly correlated with various amino acids, but it was not significant with protein nutritional value. Through cluster analysis, these samples could be divided into 2 categories, one of which was high-quality protein, and the other was poorly-nutrient. The results provided a good theoretical reference for the breeding and product development.
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