Floral Development Stage-Specific Transcriptomic Analysis Reveals the Formation Mechanism of Different Shapes of Ray Florets in Chrysanthemum.

The formation mechanism of different ray floret shapes of chrysanthemum ( × ) remains elusive due to its complex genetic background. , with the basic ray floret shapes of the flat, spoon, and tubular types, is considered a model material for studying ray floret morphogenesis. In this study, the flat and tubular type lines of at specific stages were used to investigate the key genes that regulate morphological differences in ray florets.