Comparative analysis of the texture, composition, antioxidant capacity and nutrients of natural gynogenesis blunt snout bream and its parent muscle

Abstract

Gynogenesis, as a special method of distant hybridization, can be used to accelerate the formation of breeding lines such as fish varieties and populations, and cultivate lines or varieties with higher dominant traits. While, there are few reports on the study of gynogenesis between trans order species in freshwater fish. Even the meat quality comparison between the gynogenetic offspring obtained above and their parents is rarely studied. In order to understand whether the meat quality of naturally gynogenetic blunt snout bream (GBSB) is better than that of its parents (blunt snout bream♀ and Chinese perch♂), we analyzed the texture, composition, antioxidant capacity and nutrients of natural gynogenesis blunt snout bream and its parent muscle. In the muscle of texture characteristics of hardness, springiness, gumminess and chewiness, natural GBSB were better than those of the normal BSB. Muscle fiber size of GBSB is between the maternal and the paternal fish. Compared with the maternal parent, the natural GBSB had higher antioxidant enzyme activities (CAT, SOD and GSH) and higher mineral element (Na, Mg, Ca, P and Zn) contents. In muscle nutrients, the gynogenetic offspring also had more delicious amino acids (Asp, Glu, Gly, Ala, Tyr and Phe) and fatty acids than the maternal parents. Collectively, through distant hybridization between common BSB and Chinese perch (CP), a high-quality gynogenetic fish with more nutrition and stronger muscle performance than maternal fish was obtained. The above results not only provide evidence for the hybridization origin of gynogenetic fish, but also provide new ideas for the innovation of new species.

Keywords

• Gynogenesis
• Distant hybridization
• Texture
• Antioxidant enzyme
• Mineral element
• Muscle nutrients