Dihydroflavonol 4-reductase (DFR) genes from Rosa chinensis (Asn type) and Calibrachoa hybrida (Asp type), driven by a CaMV 35S promoter, were integrated into the petunia (Petunia hybrida) cultivar 9702. Exogenous DFR gene expression characteristics were similar to flower-color changes, and effects
The petals of Rosa rugosa are generally pink and purple, never yellow. Although new varieties of R. rugosa have been bred, no yellow variety has ever been obtained. Therefore, the use of roses in garden settings has been restricted. Three R. rugosa hybrid cultivars (R. rugosa 'Miaoyu',
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