Clusters of Resistance Genes in Plants Evolve by Divergent Selection and a Birth-and-Death Process

Table 3.

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 2.06
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 1.32
Rice Xa21 copies B, D, F 0.52 2.11

  • ↵For the 3′ LRR region.

  • ↵For the 5′ LRR region (Parniske et al. 1997).

This Article

  1. Genome Res. 8: 1113-1130

Preprint Server



Current Issue

  1. March 2026, 36 (3)
  1. Current Issue
  1. Alert me to new issues of Genome Research