Alterations in the fillet quality of -knockout red sea bream : Preliminary insights into nutritional, compositional, and textural properties.

Myostatin (MSTN) is a negative regulator of skeletal muscle growth and a popular target for enhancing the productivity of farmed fish. We previously developed an -knockout breed of the aquaculture fish red sea bream () using genome editing technology. However, little is known about the effects of disruption on the fillet quality of red sea bream and other fish species. In this study, we used fillets of -deficient red sea bream to evaluate their compositional and textural changes during refrigeration. Compared to the wild type, the mutant fillets exhibited an increase in moisture content and a decrease in drippings, indicating an enhanced water-holding capacity. Furthermore, the mutant fillets showed increased water retention and marginally lower collagen content, resulting in lower breaking force, an index of texture. In conclusion, we demonstrated that disruption alters the compositional and textural properties of red sea bream fillets.