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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Reconsidering the generation time hypothesis based on nuclear ribosomal ITS sequence comparisons in annual and perennial angiosperms

Figure 2

The frequency of significant rate heterogeneity by maximum likelihood relative rate tests along with the frequency of rate heterogeneity indicated by categorical rate comparisons in simulated data. Each data point represents the proportion of 1000 replicate simulated ITS-like sequence triplets with one of the ingroup taxon evolving with a substitution rate parameter between 1.5 and 5 times faster than the other ingroup taxon. In addition, the graphs show the proportion of 1000 replicates which correctly indicated that the taxon with the faster substitution rate parameter exhibited a higher substitution rate using qualitative substitution rate comparisons regardless of whether the maximum likelihood relative rate test rejected rate constancy. Simulated sequences were obtained with mean divergence and nucleotide substitution parameter sets estimated from actual ITS sequences (see Table 2).

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