CCD4b

Gene Details:

Using an integrated genetic approach we revealed that a 5′ cis-regulatory change at CCD4b encoding CAROTENOID CLEAVAGE DIOXYGENASE 4b is a major genetic determinant of natural variation in C30 apocarotenoids responsible for red coloration of citrus peel.
CCD4b is also responsible for the production of another important C30 apocarotenoid pigment, β-citraurinene.
Phylogenetic analysis provided further evidence that functional diversification of CCD4b and naturally occurring variation of the CCD4b promoter resulted in the stepwise evolution of red peels in mandarins and their hybrids.
Functional diversification of CCD4b and naturally occurring variation of the CCD4b promoter resulted in the stepwise evolution of red peels in mandarins and their hybrids