Effects of Selective Breeding on the Nutritional Composition of Chinese Soft-Shelled Turtles, Trionyx sinensis
Effects of Selective Breeding on the Nutritional Composition of Chinese Soft-Shelled Turtles, Trionyx sinensis
Fen Wang1,2, Lin Zuo1,2, Xiang Zhou1,2, Zhu Chen1,2, Xiao Na Xu1,2, Suo Fei Ji1,2, Guan Jun Hou1,2, Cheng Jun Zhu2, Ye Zhang3, You Feng Su4, Gendong Jin5, Jia Jia Wang1,2, Yuan Gao6, Guang Tong Song1,2* and Ye Lin Jiang1,2*
ABSTRACT
A comparative study of two types of third-generation Chinese soft-shelled turtles (Trionyx sinensis) from the Yangtze River (i.e., Type A with black spots on the carapace and Type B without spots) was conducted to evaluate the effect of selective breeding on their nutritional composition. Our nutrient analysis results indicated that both types were high-quality aquatic products with high protein and low fat contents. The amino acid contents in the muscle of type A were significantly higher than those of type B (P < 0.05), but no significant differences were observed in the calipash. Additionally, the amino acid score (AAS) in the muscle of type A was >1, which was significantly higher than that of type B (P<0.05). The contents of all fatty acids and EPA+DHA were significantly higher in Type A than in type B (P<0.05), whereas there were no significant differences in the fatty acid composition of the calipash of the two types (P > 0.05). The muscle atherogenicity index (AI) and thrombogenicity index (TI) of the two types were 0.42-0.45 and 0.33-0.34, respectively, which were significantly lower than that of the calipash (P<0.05). The hypocholesterolemic/ hypercholesterolemic fatty acid ratio (HH) was 3.91–3.89, which was significantly higher than that of the calipash (P<0.05). Additionally, the collagen content of type A calipash was significantly higher than that of type B (P<0.05). Collectively, our findings indicated that selective breeding could improve the nutritional value of T. sinensis from the Yangtze River.
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