Association of mitochondrial SNPs with weight1 using population-based association analysis2.

1Body weight was recorded on each animal at approximately 7 (Weight2), 9 (Weight3) and 12 (Weight4) months post-hatching.2Population-based association analysis was performed with program PLINK version 1.07 [22]. From 40 full-sib families each with ∼17 progeny, a sibling was randomly sampled from each family to generate a population-based sample of n = 40 unrelated individuals; we repeated the random sampling to develop three sets of unrelated individuals. Here, t is the t-statistic for regression of phenotype on allele count (by.x); R2 is the square of the multiple correlation coefficient which measures the proportion of total variation explained by the regression by.x; P is the asymptotic P-value for t-statistic; the empirical P-value was estimated using 20,000 permutations; and FDR-BH is the false discovery rate [27].**indicates significance at P0.01.*indicates significance at P0.05.