Heightening the resistance of plants to microbial infection is a widely concerned issue, especially for economical crops. Receptor-like proteins (RLPs), typically with tandem leucine-rich repeats (LRRs) domain, play a crucial role in mediating immune activation, being an indispensable constituent in the first layer of defense. Based on an analysis of orthologs among , and using RLPs as a reference framework, we found that compared to , there were some obvious evolutionary diversities of RLPs among the three species. encoding genes were unevenly distributed on chromosomes, mainly on chrA01, chrA04, chrC03, chrC04, and chrC06. The orthologs of five RLPs (RLP3, RLP10, RLP17, RLP44, and RLP51) were highly conserved, but retrenchment and functional centralization occurred in RLPs during evolution. The RLP proteins were clustered into 13 subgroups. Ten presented expression specificity between R and S when elicited by , which might be fabulous candidates for resistance research.