First genome edited poinsettias: targeted mutagenesis of flavonoid 3'-hydroxylase using CRISPR/Cas9 results in a colour shift.

Unlabelled: The CRISPR/Cas9 system is a remarkably promising tool for targeted gene mutagenesis, and becoming ever more popular for modification of ornamental plants. In this study we performed the knockout of ' (') with application of CRISPR/Cas9 in the red flowering poinsettia ( cultivar 'Christmas Eve', in order to obtain plants with orange bract colour, which accumulate prevalently pelargonidin. F3'H is an enzyme that is necessary for formation of cyanidin type anthocyanins, which are responsible for the red colour of poinsettia bracts.