【摘要】 对罗氏沼虾选育新品种——"南太湖2号"与非选育群体的肌肉营养成分及营养品质进行了分析比较。研究结果表明,罗氏沼虾"南太湖2号"肌肉中粗灰分含量与非选育群体差异不显著(P>0.05),蛋白质含量显著高于非选育群体(P<0.05),肌肉粗脂肪和水分含量显著低于非选育群体(P<0.05);"南太湖2号"和非选育群体的氨基酸组成基本一致,均测定出含有17种氨基酸,其构成比例符合联合国粮农组织/世界卫生组织(FAO/WHO)的标准。"南太湖2号"的总氨基酸含量、必需氨基酸含量和鲜味氨基酸含量均显著高于非选育群体(P<0.05),根据氨基酸评分(AAS)和化学评分(CS)计算结果,第一限制性氨基酸均为异亮氨酸;"南太湖2号"肌肉中多不饱和脂肪酸(PUFA)、二十碳五烯酸(EPA)及二十二碳六烯酸(DHA)的总量分别为41.34%±0.54%和28.09%±0.45%,显著高于非选育群体(P<0.05);ω3PUFA含量显著高于非选育群体(P<0.05),而ω6PUFA含量差异不显著(P>0.05)。实验结果说明,罗氏沼虾"南太湖2号"的营养品质明显优于非选育群体。更多还原

【Abstract】 A comparison study of the muscle nutritive composition and quality between the new selected strain of Macrobrachium rosenbergii,"South Tailake No.2"and the non-selected population was carried out.The results showed that there was no significant difference of the crude ash content between the"South Tailake No.2"and the non-selected population(P > 0.05).The muscle crude protein of the"South Tailake No.2"was significantly higher than that of the non-selected population(P < 0.05),and muscle crude fat and moisture were significantly lower(P < 0.05);Muscle amino acid profiles were basically similar between the "South Tailake No.2"and non-selected population by analyzing 17 amino acids,which were in accordance with the FAO / WHO Standard.Significantly higher levels of total amino acids,total essential amino acids(EAA) and total amino acids relating to taste in the muscle of the "South Tailake No.2"were observed compared with those of the non-selected population(P < 0.05).Based on the nutritional evaluation by amino acids score(AAS) and chemical score(CS),isoleucine was identified as it first limiting amino acid;Of muscle fatty acids profile,the percentages of total polyunsatured fatty acids(PUFA) and EPA + DHA of the "South Tailake No.2"were 41.34% ±0.54% and 28.09% ±0.45% respectively.The percentages of total PUFA,EPA + DHA and total ω3PUFA of the"South Tailake No.2"were significantly higher than those of the non-selected population(P < 0.05),while the percentage of total ω6 PUFA was not of significant difference between the two groups(P > 0.05).In conclusion,the nutritive quality of the "South Tailake No.2" is more favorable,which is intrinsic to genetic factors.Thus muscle quality improvement of Macrobrachium rosenbergii by family selection seems feasible.更多还原