The method that finds Resistance Gene Analogs (RGA) using the degenerate primers designed based on the conserved motifs of plant disease resistance genes (R) was named as RGA method. There were many RGAs obtained from a variety of plant species. Some of them were proved the candidate R genes, some else were even R genes. Therefore, this was a new kind of method of cloning R genes. And what's more, these RGAs may used be as more pinpoint molecular markers of R genes and used to clone the relative R genes fro...