Ratio of Nonsynonymous to Synonymous Nucleotide Substitutions (KA:KS) in Different Regions of Plant RGenes
| Species | Genes | NBS region | LRR: intervening | LRR: xx(a)x(a)xx |
| Lettuce | RGC2family | 0.37 | 0.63[i] | 2.06[i] |
| Tomato | I2C-1vs I2C-2 | 0.47 | 0.58 | 1.17 |
| Tomato | Micopy 1 vs copy 2 | 0.43 | 0.76 | 1.93 |
| Flax | L6 vsM | 0.44 | 0.83 | 1.57 |
| Tomato | Cf4/Cf9homologs | 0.59[ii] | 1.32[ii] | |
| Rice | Xa21 copies B, D, F | 0.52 | 2.11 |
[i] For the 3′ LRR region.
[ii] For the 5′ LRR region (Parniske et al. 1997).