Fig. 2From: Prevalence of Ineffective Haplotypes at the Rice Blast Resistance (R) Gene Loci in Chinese Elite Hybrid Rice Varieties Revealed by Sequence-Based Molecular DiagnosisResistance frequency of 54 rice varieties. Rice varieties are listed in the order of number of pyramided R genes as in Additional file 6: Table S4. The number of pyramided R genes is indicated by lines. The regression curve is drawn along the resistance frequencyBack to article page