Assessment of calpastatin and insulin-like growth factor 1 genotypes in Tsigai sheep

Ardıçlı S. , Üstüner H. , Arslan Ö.

Journal of Advances in VetBio Science and Techniques, vol.7, no.1, pp.28-35, 2022 (Refereed Journals of Other Institutions)

  • Publication Type: Article / Article
  • Volume: 7 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.31797/vetbio.952531
  • Title of Journal : Journal of Advances in VetBio Science and Techniques
  • Page Numbers: pp.28-35


The aim of the present study was to evaluate the genotypic distribution of calpastatin (CAST) and insulin-like growth factor 1 (IGF1) gene polymorphisms in the Tsigai sheep breed. Phenol-chloroform extraction procedures were applied to extract genomic DNA. A total of 56 sheep were genotyped by the PCR-RFLP method. Frequencies of the alleles/genotypes were calculated by the standard procedures. To evaluate the population-genetic properties, the Hardy–Weinberg Equilibrium (HWE) testing was performed. Moreover, genetic diversity was evaluated through the number of effective alleles (Ne), heterozygosity (He), polymorphism information content (PIC), the level of possible variability realization (V%), the fixation index (FIS), and the Shannon-Weaver diversity index (H´) were estimated. Results revealed that the heterozygous genotype (0.64) frequency was remarkably higher than the homozygotes in the CAST locus. HWE testing showed a deviation (P<0.05) and the estimation of population genetic parameters indicated a moderate genetic variability in the CAST marker. Concerning IGF1, the Tsigai population was found to be monomorphic. In this context, all the animals were genotyped as the BB. The results provided by the present study may be useful in evaluating the genetic structure of the Tsigai sheep breed for which limited information is available.