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In the present study, sequencing of  TORC1  prompter region explored three SNPs at loci g.80G&gt;T, g.93A&gt;T, and g.1253G&gt;A. The SNP1 produced GG, GT and TT, SNP2 AA, AT and TT, and SNP3 produced GG, GA and AA genotypes. Allelic and genotypic frequencies analysis exhibited that SNP1 is within Hardy-Weinberg equilibrium (HWE). All three SNPs were found highly polymorphic as PIC value (0.25 &lt; PIC &lt; 0.50). At loci g.80G&gt;T the cattle with genotype GG showed significantly (P &lt;0.01) larger body length (BL), Wither height (WH), Hip height (HH), Rump length (RL), Hip width (HW), Chest depth (CD), and Chest circumference (CC). The genotype AA at g.93A&gt;T showed significantly (P&lt; 0.01 and 0.05) Larger body length (BL), Wither height (WH), Hip height, Rump length (RL), Hip width (HW), Chest depth (CD), and Chest circumference (CC). Interestingly, the carcass quality parameters such as Ultrasound loin area (ULA) and Intramuscular fat percentage (IF%) was highest in genotype GG at loci g.1253G&gt;A. These findings conclude that genotype GG at loci g.80 G&gt;T and AA at loci g.93A&gt;T could be used as genetic markers for body measurement and genotype GG at loci g.1253G&gt;A for carcass quality traits of  TORC1  gene in Qinchuan beef cattle.

Genetic variants of TORC1 gene promoter and their association with carcass quality and body measurement traits in Qinchuan beef cattle