Table 1.
Overview of the Genome Organization, Probable Posttranscriptional Regulation, and Evolutionary Pressures Acting on ROCO, LRR-Kinases, and NB-ARC–TPR Genes.
| Gene Clustering | Rapid Gene Birth and Death | Repetitive Exon Structure | Exon Shuffling | Probable miRNA Regulationa | Positive Selection on Repetitive Exons | Evolution of Original Ligand-Binding Specificities | |
| LRR-ROCO | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| LRR-kinase (type I) | — | — | ✓ | — | — | ✓ | ✓ |
| LRR-kinase (type II) | — | — | ✓ | — | — | ✓ | ✓ |
| NB-ARC–TPR | ✓ | ✓ | ✓ (partial) | ✓ | ✓ | ✓ | n.d. |
Note.—✓: present; —: absent; n.d.: not determined in this study.
a
Some repetitive LRR (respective TPR) exons predicted as miRNA targets by Cock et al. (2010).