Amino acid polymorphisms found in AvrLm4-7 proteins produced by different alleles of the avirulent <i>AvrLm7</i> form of the gene and their occurrence in populations sampled from the field experiment at Grignon.

aavrLm4-AvrLm7, isolates avirulent on Rlm7 only; AvrLm4-AvrLm7, isolates avirulent on both Rlm4 and Rlm7. bComparisons are based on the sequence of the reference AvrLm4-7 protein of isolate v23.1.3 inducing avirulence towards Rlm4 and Rlm7 genotypes. Leu45Ser is due to a T to C mutation at base 134; Val74Ile is due to G to A mutation at base 220; Ile80Thr is due to a T to C mutation at base 239; Asp86Asn is due to a G to A mutation at base 256; Gly120Arg is due to a G to C mutation at base 358. The underlined amino acids are those showing polymorphism as compared to the reference sequence. cNumber (frequency) of AvrLm7 isolates showing a given combination of amino acid substitution at positions 45, 74, 80, 86 and/or 120.