Expression Analysis of Dihydroflavonol 4-Reductase Genes Involved in Anthocyanin Biosynthesis in Purple Grains of Wheat Cloning and Function Identification of Dihydroflavonol 4-reductase Genes in Turnip Cloning and Expression of Dihydroflavonol 4-Reductase in Actinidia chinensis var. rufopulpa Cloning and Function Identification of Dihydroflavonol 4-reductase Genes in Turnip Cloning and Functional Analysis of the Key Enzyme DFR Promoters in Turnip Anthocyanin Biosynthesis Cloning and Functional Analysis of the Key Enzyme DFR Promoters in Turnip Anthocyanin Biosynthesis Cloning and Bioinformatics Analysis of DFR Gene from Brown Cotton(Gossypium hirsutum L.)Fiber Establishment of the Regeneration System and Genetic Transformation of BrDFR Gene in Chrysanthemum Cultivar Establishment of the Regeneration System and Genetic Transformation of BrDFR Gene in Chrysanthemum Cultivar Analysis on cloning of dihydroflavonol 4-reductase gene in capitulum of Chrysanthemum morifolium cv.‘Hangju’ and its expression characteristics