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Inactivation of the gene (DFR-A) coding for dihydroflavonol 4-reductase (DFR) involved in the anthocyanin biosynthesis pathway results in a yellow bulb color in onion (Allium cepa L.). Three inactive alleles have previously been identified in onion, and in this study we identified three active and six inactive novel DFR-A alleles from extensive analyses of diverse onion germplasms. Of the germplasms...