Figure 4

Genetic events of the RPW8 domain and other domains during the evolutionary history.
Dashed line represents non-coding region; dashed box means presence or absence of LRR domain in RPW8-encoding genes. (A,E): two hypotheses of domain emergence, de novo origination (A) and duplication-divergence (E) mechanism; (B): domain loss; (C): domain fission; (D): domain fusion; (F): duplication.