Table 1 Hypotheses and the corresponding scenarios for the grouping of eudicot TFL1 and magnoliid TFL1-like genes
Hypotheses | Scenarios |
|---|---|
1.ω 1 = ω 2 ≤ 1 | Functional constraint hypothesis |
2.ω 1 = ω 2 > 1 | Synchronous selection hypothesis |
3.ω 1 ≠ ω 2 | Phylogenetic convergence driven by different selective pressures |
3.1.ω 1 > 1, ω 2 > 1 | Different strengths of positive selection on eudicot TFL1 and magnoliid TFL1-like |
3.2.ω 1 > 1, ω 2 ≤ 1 | Positive selection drives the convergence of eudicot TFL1 into magnoliid TFL1-like |
3.3.ω 2 > 1, ω 1 ≤ 1 | Positive selection drives the convergence of magnoliid TFL1-like into eudicot TFL1 |
3.4.ω 0 < ω 1 ≤ 1 | Relaxation of selective constraints for eudicot TFL1 |
3.5.ω 0 < ω 2 ≤ 1 | Relaxation of selective constraints for magnoliid TFL1-like |
3.6.ω 1 ≤ ω 0 ≤ 1 | Purifying selection on eudicot TFL1 |
3.7.ω 2 ≤ ω 0 ≤ 1 | Purifying selection on magnoliid TFL1-like |
