FIG 1.

Release of 3-MH (A) and 4-MMP (B) by 80 wine strains in SGJ-thiol medium, grouped according to their IRC7 genotype. s/s refers to the homozygous short allele (IRC7^S IRC7^S) and l/l to the homozygous long or full-length allele (IRC7^L IRC7^L), while s/l refers to heterozygous strains (IRC7^S IRC7^L). Means with the same letter are not significantly different from each other (Tukey’s honestly significant difference [HSD] test, P < 0.05). Totals of 43, 20, and 17 strains from the s/s, s/l, and l/l IRC7 genotypes, respectively, were included.