TABLE 1. Presence of the PMA1 and CEM1 alleles in 44 segregants of the TDA1(4)/S288c hybrid. The presence of the CEM1TDA1(4) or CEM1S288c and PMA1TDA1(4) or PMA1S288c alleles was assessed by Sanger sequencing in 44 segregants of the hybrid TDA1(4)/S288c strain. The level of ethyl acetate production in semi-anaerobic fermentations after 96 h is indicated for each segregant.