Association of Leptin and Stearoyl-Coenzyme A Desaturase Gene Polymorphisms With Carcass Traits and Meat Quality in Aberdeen Angus Cattle

Yonga S., Şentürk N., Karalar B., Çelik R., Aliyeva M., Ardıçlı S.

9th International Medicine and Health Sciences Researches Congress, Ankara, Türkiye, 18 - 19 Mart 2022, cilt.9, sa.131, ss.520-521

  • Yayın Türü: Bildiri / Özet Bildiri
  • Cilt numarası: 9
  • Basıldığı Şehir: Ankara
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.520-521
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Leptin (LEP) and stearoyl-coenzyme A desaturase (SCD) are important genes in beef cattle genetics, especially for their significant effects on fat metabolism. This study aimed to evaluate the effects of the LEP A80V and SCD V293A polymorphisms on carcass traits and meat quality in Aberdeen Angus bulls. A total of 104 animals aged 14-16 months with a mean slaughter weight of 577.93 kg were used. The genotyping was performed using the PCR-RFLP method and genetic merit for each SNP regarding fattening performance was quantified using general linear mixed models. Slaughter season and age were included in the models as fixed effects. Traits included in the study were slaughter weight, hot and chilled carcass weight, dressing percentage, chilling loss, carcass pH, carcass fatness, backfat thickness, marbling, and meat color score. The genotypic/allelic frequencies and Hardy-Weinberg Equilibrium was estimated and population genetics parameters including heterozygosity, number of effective alleles, and polymorphism information content were calculated. Results revealed that all three genotypes were observed for both of the markers. The number of animals with the AA genotype in the SCD marker was remarkably low (n=9) among the other genotypes studied, resulting in relatively lower genetic variability in this study. ANOVA results revealed that LEP A80V was significantly associated with hot carcass weight (P<0.05), chilled carcass weight (P<0.01), dressing percentage (P<0.01), and marbling (P<0.05). The SCD V293A polymorphism significantly influenced dressing percentage (P<0.01) and marbling (P<0.05). No significant associations were observed for the slaughter weight, chilling loss, carcass pH, carcass fatness, backfat thickness, and meat color score. A novel effect of the LEP×SCD interaction was observed for chilling loss (P<0.05). These results suggest that LEP A80V and SCD V293A SNPs are useful markers for the improvement of not only meat quality but also carcass traits in commercial Angus cattle.