TABLE 2.
Divergence time of T. urartu and Ae. tauschii in million years estimated from intronic nucleotide sequence divergence and the time of origin of wild tetraploid wheat T. turgidum ssp. dicoccoides in MY estimated from the number of locus duplications
| Gene | Total wheat-barley nucleotide divergence | Mean nucleotide substitution rate per MY | T. urartu and Ae. tauschii divergence time | Origin of T. dicoccoides |
|---|---|---|---|---|
| UP | 0.04 | 0.004 | 4.0 | 0.54 |
| HX | 0.04 | 0.004 | 1.2 | 0.16 |
| SMP | 0.06 | 0.006 | 3.7 | 0.49 |
| ADM | 0.09 | 0.008 | 2.0 | 0.27 |
| Mean | 2.7 | 0.36 | ||
| 95% confidence interval | 1.4–4.1 | 0.19–0.54 |