The article presents the results of an analysis of the calculated genetic and phenotypic correlations between the commercial length and live weight of the Chuvash scaly and Anish mirror carp breeds. The analysis of breeding value by live weight and commercial length of both breeds is carried out. It was found that the genetic relationship between length and weight was stronger in the Anishka mirror breed – 0.83 and 0.74 in the Chuvash, which may indicate the best breeding potential of the first breed. However, it should be noted that the phenotypic correlation in both breeds had a negative close value (-0.70 and -0.72), which confirms the strong influence of external factors that offset the genetic predisposition. The above analysis revealed a significant variability in the breeding value of the Anish mirror carp. According to the highest EBV values, two individuals had the highest productivity – 0.73±0.12 and 0.50±0.12, several individuals with a range of 0.08-0.12 had the average potential, and the majority were low-yielding individuals (EBV <0.08±0.12). According to the fishing length, two different individuals with EBV 2.98±0.81 and 1.73±0.81 cm were identified. The capras of the Chuvash scaly breed showed more modest indicators (the maximum EBV in live weight was 0.25±0.12, and in commercial length 1.98±0.81). In commercial length, the Chuvash scaly carp shows good potential and can be valuable breeding material for purebred breeding.
Ilyushina et al. (Thu,) studied this question.
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