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Relationships among the relative expression levels of the three genes and the content of Safflower yellow pigments during flower development in different varieties. HY, Jihongyou var.; EH, Jihongerhao var.; bud, early, full and fade indicate the flowering stages; CHS, chalcone synthase; CHI, chalcone isomerase; and ANS, anthocyanidin synthase. Data were obtained from three biological replicates of three independent experiments and are means ± SE (n = 3).
