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Table 2 Relationships between chick age, hatching rank, heterozygosity and growth in body weight, wing and tarsus length

From: Evidence that pairing with genetically similar mates is maladaptive in a monogamous bird

Explained variable Hz index used A*H*R AIC A*H in A-chicks A*H in B-chicks
Body weight H <0.0001 3267.5 0.68 <0.0001
  SH <0.0001 3271.7 0.44 <0.0001
  IR <0.0001 3273.3 0.86 <0.0001
  H' 0.020 3284.8 0.12 0.0020
  SH' 0.046 3285.9 0.094 0.0038
  IR' 0.064 3289.2 0.12 0.0055
Wing length H <0.0001 2612.3 0.58 <0.0001
  SH 0.0001 2615.0 0.91 <0.0001
  IR <0.0001 2615.4 0.39 <0.0001
  H' 0.013 2621.7 0.31 0.0007
  SH' 0.037 2621.6 0.15 0.0013
  IR' 0.038 2626.8 0.41 0.0033
Tarsus length H 0.0017 2758.8 0.71 0.0025
  IR 0.0013 2760.4 0.95 0.011
  SH 0.012 2762.2 0.28 0.0045
  H' 0.027 2765.2 0.75 0.04
  IR' 0.014 2767.2 0.20 0.054
  SH' 0.089 2766.3 0.97 0.089
  1. We used AIC for model selection. Parameters: A (Age), H (Heterozygosity, estimated by the index in the column "Hz index used") and R (hatching Rank, a binary effect). For heterozygosity indices: H, SH and IR are calculated over all loci, while H', SH' and IR' are calculated without OHW loci and K31. With either heterozygosity index, the structure of the selected model was: A+H+R+AH+HR+AHR+A2 plus the random effect of chick identity. Since the interaction A*H*R was significant, we also tested the significance of the A*H effect in each rank (A or B-chicks). P-values below 0.05 are in bold. (Note: a more complete version, with the mean effect size for heterozygosity for each analysis, is given as additional file 1).