Table 2. Calculation of Ka and Ks ratios of 12 duplicated CaGRAS gene pairs.
| Gene pairs | Ka | Ks | Ka/Ks | Duplication Type | Selection Type |
|---|---|---|---|---|---|
| CaGRAS4 vs. CaGRAS5 | 0.5433 | 2.9882 | 0.1818 | Tandem | Purifying |
| CaGRAS20 vs. CaGRAS21 | 0.3469 | 3.0958 | 0.1121 | Tandem | Purifying |
| CaGRAS13 vs. CaGRAS24 | 0.2277 | 1.2418 | 0.1834 | Segmental | Purifying |
| CaGRAS18 vs. CaGRAS22 | 0.1727 | 0.6141 | 0.2813 | Segmental | Purifying |
| CaGRAS18 vs. CaGRAS32 | 0.4234 | 2.6272 | 0.1611 | Segmental | Purifying |
| CaGRAS18 vs. CaGRAS40 | 0.1706 | 0.6532 | 0.2612 | Segmental | Purifying |
| CaGRAS22 vs. CaGRAS40 | 0.1332 | 0.6816 | 0.1955 | Segmental | Purifying |
| CaGRAS22 vs. CaGRAS32 | 0.3849 | 3.4016 | 0.1132 | Segmental | Purifying |
| CaGRAS23 vs. CaGRAS43 | 0.6308 | 11.5851 | 0.0545 | Segmental | Purifying |
| CaGRAS25 vs. CaGRAS35 | 0.4549 | 3.1434 | 0.1447 | Segmental | Purifying |
| CaGRAS28 vs. CaGRAS32 | 0.2969 | 3.0958 | 0.0959 | Segmental | Purifying |
| CaGRAS32 vs. CaGRAS40 | 0.4094 | 3.8387 | 0.1066 | Segmental | Purifying |
Note:
Ka indicates nonsynonymous substitution rate, and Ks indicates synonymous substitution rate.