Abstract：In order to study the muscle quality of antilymphocyst bastard halibut Paralichthys olivaceus line and its parental gynogenesis line, the nutritional composition of muscles of the 7-month-old maternal with body weight of (219.88±33.82) g, paternal with body weight of (213.53±27.20) g and antilymphocyst bastard halibutwith body weight of (237.51±26.04) gwas analyzed by conventional methods. The results showed that the hybrids were similar to their parents in crude protein, crude ash and moisture (P>0.05). However, there was much higher levels of lipid contents in the maternal strain compared to the paternal strain and hybrids (P<0.05). Total 18 amino acids including eight essential amino acids, two semi-sessential amino acids and eight nonessential amino acids were detected in all strains. The hybrid had the maximal muscular contents of total amino acid and essential amino acids. The constitutional rate of all essential amino acids in general met with the FAO/WHO standard, with the essential amino acids indices (EAAI) of 87.4 (hybrid), 79.04(maternal strain) and 79.86 (paternal strain). The hybrid had the maximal nutritional value, followed by that of maternal strain and paternal strain, and significantly lower levels of saturated fatty acid(SFA), monounsaturated fatty aicd(MUFA) and polyunsaturated fatty acid(PUFA) than the paternal strain and maternal strain did (P<0.05). Moreover, there were larger EPA+DHA contents in maternal strain than those in the hybrids and paternal strain (P<0.05). The hybrid, including parental strains, showed high nutritional values. The maternal strain was used as novel germplasm for EPA+DHA and PUFA in bastard halibut breeding. The findings provided the basic data for lymphocystis disease-resistant breeding of bastard halibut in the future.
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2023, Vol. 42 
