Table 3.
Evolutionary rate (branch length) comparisons between phylogenetically paired taxa with single versus duplicate control regions. For each taxon pair shown in Figure 3, a paired t-test (two-tailed) was used to compare branch lengths across 12 mitochondrial protein coding genes; ND6 sequence data for one taxon (D. accipitrinus) was not available, so only the twelve H-strand protein coding genes were included in the comparisons. Branch lengths were estimated using RY-coded sequence data and four-fold degenerate (4fd) sites for each of the genes. Comparisons that showed a significant difference between paired taxa across the 12 coding genes are highlighted in bold type, and the directionality of the difference between the rate of sequence evolution in the taxon with a single control region (1CR) and the taxon with the duplicate control region (2CR) is indicated.
| Taxon pair | t-statistic | P value | d. f. | Rate comparison | |
|---|---|---|---|---|---|
| RY-coding | 1 | −3.323 | 0.007 | 11 | 1CR > 2CR |
| 2 | 0.975 | 0.350 | 11 | n. s. | |
| 3 | 2.840 | 0.016 | 11 | 2CR > 1 CR | |
| 4 | 4.447 | 0.001 | 11 | 2CR > 1 CR | |
| 5 | −1.153 | 0.154 | 11 | n. s. | |
| 6 | −4.932 | 0.0004 | 11 | 1CR > 2CR | |
| 4fd sites | 1 | −2.281 | 0.043 | 11 | 1CR > 2CR |
| 2 | 1.687 | 0.120 | 11 | n. s. | |
| 3 | 2.835 | 0.016 | 11 | 2CR > 1 CR | |
| 4 | 2.930 | 0.014 | 11 | 2CR > 1 CR | |
| 5 | −0.405 | 0.694 | 11 | n. s. | |
| 6 | −2.521 | 0.028 | 11 | 1CR > 2CR | |