Figure 1.

Initial characterization of a TB white grape variant line. A, TT and TB plant phenotypes. Mature plants show the absence of anthocyanin pigments in TB bunches. B, Southern blot for a VviMybA1 probe showing the loss of one copy in TB. Only the smallest positive fragment, corresponding to the nonfunctional allele with a predicted ApaI target site within the Gret1 retroelement, is kept in TB. C, Loss of VviMybA1 heterozygosity in TB. Only one VviMybA1 haplotype is kept in TB according to the LOH at original heterozygous single-nucleotide polymorphisms (SNPs) in TT.