New progress has been made in the ecological regulation of the flavor quality of grass carp in the Pearl River Institute of the Chinese Academy of Fishery Sciences

Recently, the innovation team of the ecological environment regulation of freshwater pond aquaculture in the Pearl River Fisheries Research Institute of the Chinese Academy of Fishery Sciences has made new progress in the study of the influence of ecological factors on the flavor quality of grass carp, and the relevant results are "The effect of nitrite and nitrate treatment on growth performance, nutritional composition and.
" flavor-associated metabolites of grass carp (Ctenopharyngodon idella)" published online in the international journal Aquaculture (IF:5.
135, JCR Q1
).
The paper was funded by the National Modern Agricultural Industry Technology System Post Scientist Project and the National Key Research and Development Program Blue Granary Key Special Project
.
Doctoral students Zhang Junming, Fu Bing, and Li Yichao are the co-first authors of the paper, and Researcher Yu Ermeng and Professor Kaneko of Victoria University in Houston are the co-corresponding authors
of the paper.

 

The ecological factors of the water body are closely related
to the flavor quality of grass carp.
In the early stages, the team screened out that nitrites and nitrates are key ecological factors that affect flavor quality, but the mechanism of their effects is not clear
.
On this basis, the team used metabolomics to explore the key pathways
through which nitrites and nitrates affect the flavor metabolism of grass carp.
The results show that the metabolic changes caused by nitrite are significant than nitrates and are more critical ecological factors
.
High concentration of nitrite stress will affect the growth performance of grass carp, accelerate the absorption of earthy substances from the outside world by grass carp and affect the synthesis
of flavor amino acids, peptides and other flavor metabolites in the muscle tissue of grass carp.
In addition, kegg metabolic pathway analysis showed that nitrite stress downregulated the biosynthetic pathways
of arginine, glutamate, and proline.

 

In this study, the mechanism of ecological factors affecting the flavor quality of grass carp was preliminarily explored, and the key metabolic pathways
were identified.
Provide reference materials
for the study of ecological regulation and improvement of the quality of farmed fish.