Amino Acid Composition in Fillets of Mirror Crossbreds Common Carp (Cyprinus carpio, Linnaeus 1758)

Abstract

The aim of the study was to determine the amino acid composition in fillet proteins of newly bred mirror carp lines. In the experiments, the Hungarian mirror carp (M2) were used at the maternal position. These were crossed with male carp of other breeds (top crossing). They included the Hungarian mirror carp (M2) for the production of a pure line, the Hungarian mirror line (L15), the Israeli breed (DOR70) and the Northern mirror carp (M72). The scaly hybrid of the Ropsha (ROP) and the Tataj (TAT) carp was used as a control. In view of the genetic specification of the carp groups monitored, numerous differences (P  0.01 and P  0.05) in the composition of specific amino acids (EAA: Val, Leu, Lys, Arg, Met NEAA: Asp, Glu, Tyr) and their total amounts (EAA sum , NEAA sum ) were found between the scaly control (ROP × TAT) and the pure line M2. Higher amino acid values were found in control hybrids. Compositions of amino acids in fillet muscle tissue of experimental mirror carp (M2 × L15, M2 × DOR70) were practically identical. Compared to the controls (ROP × TAT), these carp groups contained less (P  0.01) Leu, Lys, Arg and Glu. A composition of amino acids statistically comparable with the controls (ROP × TAT) was found only in the M2 × M72 hybrid with the exception of Glu, which was found in smaller quantities in this hybrid (P  0.01). In terms of sex differences, the greatest amounts of amino acids were found in fillets of male ROP × TAT controls, the amino acid compositions in male and female mirror carp were practically the same. In this type of evaluation, i.e. regarding amino acid composition, the only carp comparable with the ROP × TAT control is the M2 × M72 hybrid. Fish meat, carp, amino acid, chemical indicator, qualityIn the Czech Republic, the common carp (Cyprinus carpio, Linnaeus 1758) of the family Cyprinidae is considered as economically the most important fresh-water fish species reared for commercial purposes. Typically extensive to semi-intensive in character, carp production is based on the farming of F1 generation fry obtained from controlled reproduction of sexually mature genetically specified generation carp. The breeds of mirror carp used in the Czech Republic for this purpose are of the original Hungarian line denominated as M2, or a hybrid between M2 and the Northern Mirror Carp breed referred to as M72 (Czech origin). In scaly carp, the most frequent generation fish is the Třeboňský scaly carp, Mariánsko-Lázeňský scaly carp (both breeds of Czech origin), or a hybrid between the Ropsha carp (ROP) of Russian origin and the Tataj carp (TAT) of Hungarian origin. Production of carp at smaller fish farms relies also on the fry from local carp populations that have been given names derived from the nearby villages or locations, and which are often not unambiguously genetically specified. Carp production utilizes natural foods supplemented with cereals and complementary feed mixes.Carp breeding receives systematic attention with the objective to enhance useful characteristics and pro...

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