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Table 3 Highest test statistics and proportion of phenotypic variance explained at most likely QTL position when fitting additive QTL and dominance QTL effects for 40-day bodyweight and conformation score on chicken chromosomes 1, 4 and 5

From: Detecting parent of origin and dominant QTL in a two-generation commercial poultry pedigree using variance component methodology

Chr pos Model fitting additive QTL Model fitting additive and dominant QTL
   ††LRT variance component ††LRT   variance component
   add Va Vp Vc res addom dom Va Vp Vc Vd res
Bodyweight
1 55 5.0 0.07 0.09 0.02 0.89 5 0 0.07 0.01 0.02 0.00 0.89
4 85 5.0 0.04 0.04 0.03 0.89 5.7 0.6 0.03 0.05 0.02 0.02 0.88
5 5 1.4 0.02 0.06 0.02 0.89 5.3 3.9* 0.00 0.08 0.01 0.05 0.86
Conformation score
1 50 2.3 0.04 0.04 0.04 0.89 2.3 0 0.04 0.04 0.04 0.00 0.88
4 15 4.1 0.04 0.04 0.05 0.87 10.4* 6.3* 0.00 0.06 0.03 0.06 0.84
5 25 3.8 0.03 0.04 0.04 0.87 7.9* 8.1* 0.00 0.07 0.04 0.04 0.85
  1. Proportion of phenotypic variance explained at highest test statistic (LRT) Vp: polygenic variance, Va: additive QTL variance, Vc: maternal (dam) variance, Vd: dominant QTL variance, res: residual variance
  2. ††LRT is test statistic obtained from best position (pos), add is additive QTL versus null model, addom is additive and dominant QTL versus null model, dom is additive and dominant QTL versus additive QTL model * 5% linkage group-wise significance calculated from 1000 permutations of within dam genotype for 18 positions on chromosome 4 for weight and conformation-score