FIG. 4.—
Example of one 5-taxon simulated alignment, from the HGT case. (a) Location of true breakpoints (•) and of breakpoints inferred by MDL (*). (b–d) Posterior probability of the sites' true trees obtained from concordance analysis with prior parameter α = 1 (- - -) or α infinite (—) after three partitioning strategies: true partition (b), MDL partition with λ = 7 (c), and fixed-length intervals (d).