Figure 1

Correlation of chicken chromosome length with chromosomal GC3 content for chicken genes and their zebra finch orthologs. The best fitting linear correlations of GC content at the third codon position (GC3) for chicken (red, r² = 0.435, p = 0.010) and zebra finch (blue, r² = 0.358, p = 0.030) with chicken chromosome size (on a log scale) are shown by the dashed lines.