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Fig. 4 | EvoDevo

Fig. 4

From: Large-scale gene expression study in the ophiuroid Amphiura filiformis provides insights into evolution of gene regulatory networks

Fig. 4

Expression pattern of orthologs of late skeletogenic genes. a WMISH showing the expression pattern of of Afi-tgif, Afi-erg, Afi-hex, Afi-dri, Afi-foxB, and Afi-nk7 at different developmental stages. At blastula stage, orthologs of the three interlocking loop genes are expressed in the same domain; however, details of their vegetal plates show that Afi-tgif and Afi-hex are expressed in a wider domain than Afi-erg. At mesenchyme blastula, Afi-tgif, Afi-erg, and Afi-hex are co-expressed in NSM cells. From blastula to gastrula, Afi-dri and Afi-foxB shows no expression in SM lineage (skeletogenic mesodermal cells shown with black arrow). Afi-nk7 shows expression in SM lineage during blastula and mesenchyme blastula stage only. b Normalized timeseries comparison shows inverted sequence of onset of expression between brittle star (solid lines) and sea urchin (dashed lines). Sea urchin data were obtained from [59]. VV vegetal view, SVV semi vegetal view, Bl blastula, MBl mesenchyme blastula, G gastrula

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