不同群体缢蛏营养成分的多元性分析

Multivariation Analysis of Nutrients of Sinonovaculla constricta Lamarck in Different Populations

本实验研究不同地区缢蛏的总蛋白、脂肪、氨基酸、脂肪酸、灰分、呈味核苷酸、甜菜碱、游离总糖、肌球蛋白等与品质密切相关的各类指标。其中,脂肪酸、游离总糖、外套膜中呈味核苷酸及肌球蛋白含量均呈现出春季含量明显高于秋季的规律(p<0.05),氨基酸总量、必需氨基酸、呈味氨基酸、总蛋白、脂肪、灰分含量则呈现出相反的规律(p<0.05),甜菜碱含量无显著差异。春季的长街种群优势主要体现在甜菜碱、氨基酸总量、必需氨基酸、呈味氨基酸、呈味核苷酸的含量;秋季的长街种群缢蛏优势主要体现在游离总糖、脂肪、肌球蛋白明显高于当季的其他种群(p<0.05)。由于养殖方式的不同造成了缢蛏营养的多样性,从总体上可以看出,不管是春季还是秋季养殖缢蛏,滩涂养殖方式的缢蛏品质上明显优于围塘养殖缢蛏,聚类分析结果也可以看出,各样品最终可以聚为两类,即滩涂养殖和围塘养殖。

This study aimed to analyze several indexes ofSinonovaculla constricta Lamarck in different populations concerning to nutrition and flavour, including total protein, fat, amino acid, fatty acid, ash, flavour nucleotide, lycine, sugar and myosin and so on. Compared with Sinonovaculla constricta cultivated in autumn, the S. constricta cultivated in spring has more fatty acid, sugar, flavour nucleotide in mantle and myosin. However, total amino acid, essential amino acid, flavour amino acid, total protein, fat and ash come to the inverse disciplinarian. But lycine has no significant differences among these samples. Changjie population cultivated in spring has significant advantage in lycine, total amino acid, essential amino acid, flavour amino acid and flavour nucleotide in foot. The population cultivated in autumn has significant advantage in sugar, fat and myosin. The quality of S. constricta varies due to different cultivations. Regardless of different cultivating seasons, tidal-fiat aquaculture is significantly better than pond aquaculture. It was concluded that all the samples can be clustered into the above-mentioned two aquacultures according to clustering analysis.