不同亚麻籽品种氨基酸含量测定及品质综合评价

Measurement of amino acid and comprehensive quality assessment of different flaxseed variety

目的:研究不同亚麻籽品种氨基酸含量及基于氨基酸含量的品质差异。方法:以6个产地的12个亚麻籽品种为研究对象,测定其氨基酸含量,并以17种氨基酸含量为评价指标进行主成分分析和聚类分析,研究不同品种亚麻籽氨基酸含量及基于氨基酸含量的品质差异。结果:亚麻籽品种对不同氨基酸含量的影响顺序为Met>Cys>Phe>Tyr>Arg>Glu>Pro>His>Asp>Ser>Lys>Gly>Thr>Ala>Ile>Val>Leu。主成分分析提取出3个主成分,其累计方差贡献率达86.695%,Ala、Arg、Thr、Leu和Cys可以作为12个亚麻籽品种基于氨基酸含量的品质综合评价指标。隶属函数法评价得出12个亚麻籽品种基于氨基酸含量的品质优劣顺序为晋亚7>晋亚8>轮选2>坝亚9>伊亚3>轮选1>宁亚16>宁亚17>伊亚4>陇亚8>坝亚11>陇亚10。结论:综合品质最佳亚麻籽品种为晋亚7,最差亚麻籽品种为陇亚10,综合评价将12个亚麻籽品种划分为四大类。

Objective:This study aimed to investigateing amino acid content and quality difference of different flaxseed varieties,based on their amino acid content.Methods:12 flaxseed varieties from 6 producing areas were used to tested materials,amino acid contents in flaxseed were measured and 17 amino acid contents were used to assessing index,which was analyzed by principal component and clustering for studying the amino acid content and quality difference of flaxseed based on amino acid content.Results:affected order of flaxseed varieties on different amino acid content was Met>Cys>Phe>Tyr>Arg>Glu>Pro>His>Asp>Ser>Lys>Gly>Thr>Ala>Ile>Val>Leu.Three principal components were extracted,and their accumulative variance contribution rate reached 86.695%;Ala,Arg,Thr,Leu and Cys could be used as a comprehensive assessing index of 12 flaxseed varieties on amino acid content.The order of 12 flaxseed quality from good to bad based on amino acid content by subordinate function method was obtained,and the order was Jinya7>Jinya8>Lunxuan2>Baya9>Yiya3>Lunxuan1>Ningya16>Ningya17>Yiya4>Longya8>Baya11>Longxi10.Conclusion:Jinya7 is the best flaxseed variety,and Longya10 is the worst flaxseed variety in comprehensive quality;12 flaxseed varieties were divided into four classes by comprehensive assessment.