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The aim of this experiment was to evaluate possible relationships between two SNPs in the PLAG1 gene and some cattle traits such as: birth weight, average daily gains between birth and weaning, weaning weight adjusted to 210 days of age, age at first calving, body weight of cows, muscularity, height at hip cross and chest girth. The study included 102 Limousine cows. The genotypes were identified by the PCR-RFLP method. The frequencies of the most common alleles and genotypes were as follows: rs109815800 – allele G 0.523 and genotype GT 0.355; rs210941459 – allele C 0.584 and genotype CC 0.411. The results of the statistical analysis for the both polymorphisms indicate significant differences (P≤0.05, P≤0.01) for such traits as: average daily gains between birth and weaning, weaning weight adjusted to 210 days of age, age at first calving and body weight of cows, and in the case of rs210941459 polymorphism, an association with muscularity was also shown. Therefore, this study may be a prelude to the development of species and can help in the selection that would ensure appropriate quality of milk. Therefore, this study can be an introduction to the development of a species and can help in the selection that will ensure the appropriate quality of shaping the growth traits of cattle.
Kowalewska-Łuczak et al. (Sun,) studied this question.