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Table 1 Genotypic dependences of iridal hypopigmentation

From: A genome-wide association study reveals a locus for bilateral iridal hypopigmentation in Holstein Friesian cattle

SNP (chromosome) Genotype Cases (n = 18) Controls (n = 316) P-value
   Obs. Exp. HWE Obs. Exp. HWE  
BTB-00352779 (BTA8) CC 5 14.5   265 254.9   
AC 13 3.4   50 60.2   
AA 0 0.1 5.8 1 0.9 0.72 6.19e-07
  1. Abbreviations: HWE Hardy-Weinberg equilibrium χ 2-value (p > 0.05, df = 2), Obs. observed number of genotypes, Exp. expected number of genotypes, P-value determined using a 3 × 2 contingency table and Fisher’s Exact statistics (two-tailed)