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Table 2 Correlations of divergence at fourfold degenerate sites between avian lineages in 1-Mb windows

From: Molecular evolution of genes in avian genomes

  Without controlling for GC Controlling for GC
  R d.f. P r 2 r P r 2
Windows based on zebra finch genome        
   Zebra finch/chicken 0.366 441 1.89 × 10-15 0.134 0.156 0.001 0.024
   Zebra finch/ancestral -0.048 441 0.309 0.002 -0.146 0.002 0.021
   Chicken/ancestral 0.074 441 0.119 0.005 -0.046 0.331 0.002
Windows based on the chicken genome        
   Chicken/zebra finch 0.778 438 3.71 × 10-16 0.141 0.138 0.004 0.019
   Chicken/ancestral 0.073 438 0.017 0.013 -0.008 0.868 0.000
   Zebra finch/ancestral -0.064 438 0.180 0.004 -0.161 0.001 0.026
  1. d.f., degrees of freedom.