Figure 2
From: Quantification of ortholog losses in insects and vertebrates
The number of ortholog losses correlates with the rate of amino acid substitutions. The number of orthologous group (U, N, P, I/V) losses normalized with the total size of the fraction is plotted versus the branch length of the maximum-likelihood phylogenetic tree (Figure 1). (a) All ortholog types combined; (b) U and N orthologs; (c) Patchy orthologs; (d) Insect- and vertebrate-specific orthologs. Filled symbols denote vertebrates and open symbols denote insects. Spearman rank correlations: U orthologs, rs = 0.79, p = 0.015; N orthologs, rs = 0.67, p = 0.05; P orthologs, rs = 0.90, p < 0.01; I/V orthologs, rs = 0.83, p < 0.01. Regression slopes for U and N are not statistically different. Anc, ancestral.