Fig. 1From: A nonsense mutation in B3GALNT2 is concordant with hydrocephalus in Friesian horsesManhattan plot of hydrocephalus in Friesian horses. Significance level based on genotype differences between cases (n = 13) and controls (n = 69) using a χ 2-test (2df). The horizontal line is the Bonferroni corrected significance level (P = 1.68 × 10−6)Back to article page