Figure 17
From: History of a prolific family: the Hes/Hey-related genes of the annelid Platynereis
Scenario of Platynereis Hes/Hey -related genes subfunctionalisation after duplications from a multifunctional Pdu-Hes -ancestral gene. Phylogenetic relationships of Platynereis Hes/Hey-related genes are represented in a simple tree in front of which expression patterns are mapped. Expression patterns related to segmentation process, neurogenesis, chaetogenesis, in the stomodeum and the midgut are respectively coded in green, pink, yellow, blue and orange. A putative ancestral multifunctional Platynereis Hes-like gene is represented. Present expression patterns and evolutionary history of Hes/Hey-related genes may be the result of numerous duplication-degeneration-complementation (DDC) events.