Fig. 2
From: Novel haplotypes and networks of AVR-Pik alleles in Magnaporthe oryzae
Possible scenario for M. oryzae AVR-Pik allele-rice Pik allele interactions and coevolution. Chronological order is given on the left (time order). The AVR-Pik homolog H01 (AVR-Pik-D) was derived from an ancestral M. oryzae gene. AVR-Pik-D (H01), H07 and H09 are recognized by Pikp; thus, the altered alleles AVR-Pik-E (H05) and H08 evolved. In response to this situation, another Pik allele, Pik, evolved that can recognize five alleles, namely, AVR-Pik-D (H01), H07, H09, AVR-Pik-E (H05) and H08. Then, yet another AVR-Pik allele, H06, was derived that cannot be recognized by Pikp and Pik. Next, the rice R gene Pikm was utilized that recognizes AVR-Pik-D (H01), H07, H09, AVR-Pik-E (H05), H08 and H06. Then, two more AVR-Pik alleles, namely, AVR-Pik-A (H02) and AVR-Pik-B (H03), were derived that cannot be recognized by Pikp, Pik and Pikm. Next, the rice R gene Pikh was utilized that recognizes AVR-Pik-D (H01), H07, H09, AVR-Pik-E (H05), H08, H06, AVR-Pik-A (H02) and AVR-Pik-B (H03). Then, two other AVR-Pik alleles, namely, AVR-Pik-C (H04) and H10, evolved that cannot be recognized by any of the five Pik alleles