Table 4.
Correlation coefficients of genome-wide codon selection measures with the number of tRNA genes in each genome.
| Pearson Correlation Coefficient of tRNA Gene Number and Genome-wide Codon Selection Statistica | |||||||
|---|---|---|---|---|---|---|---|
| Family | Number of Genomes | Number of Orthologues | ACEχ2coreb | ACEχ240b | ENCdiff | ΔN'c | S |
| Enterobacteriaceae | 14 | 1060 | 0.628 (p = 0.008)c | 0.338 (0.119) | 0.264 (0.181) | 0.399 (0.079) | 0.257 (0.188) |
| Mycobacteriaceae | 9 | 982 | 0.409 (0.167) | 0.461 (0.106) | 0.512 (0.080) | 0.495 (0.088) | 0.153 (0.347) |
| Bacilliaceae | 12 | 541 | 0.556 (0.030) | 0.440 (0.076) | 0.373 (0.116) | 0.346 (0.136) | 0.427 (0.083) |
a. All codon statistics were calculated using the Translation40 gene set to construct fo and the shared set of ORFs to construct fn.
b. ACEχ2core was calculated from all orthologues; ACEχ2 40 was calculated from Translation40 genes.
c. Probability of calculating a correlation coefficient this large in the absence of a true correlation; one-tailed test using Fisher's z-transformed correlation.