Mayflies are a key order to understanding the evolution of insects due to their phylogenetic position. Within this lineage, the family of Baetidae has evolved a striking sexual dimorphism: in addition to the lateral compound eyes, males develop an extra pair of extremely large dorsal, turban-shaped eyes. Thus, by comparing males versus females, these insects a privileged system to understand the origin and integration of new visual structures.
\nFor this, we have successfully established the mayfly Cloeon dipterum as a model species with a continuous culture in the lab and a high-quality reference genome that allows as describe the development of the eye and its integration with the optic lobes of male and female Cloeon nymphs using confocal and electronic microscopy. Furthermore, we compare sex-specific gene expression in nymphal heads at single cell resolution, to show a set of candidate genes specifically expressed in male cell populations. Together with ATAC-seq and CRISPR\/Cas we uncover the GRN responsible for the origin of this new visual system.<\/p>\n
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