Extremely excited to share the first major project from our lab, led by the brilliant @dpowell_daniel with major contributions from Mateo Garcia, Mackenzie Keegan, @lepatoptera, @pandolfatto, @gilrosenthal, Manfred Schartl, and other co-authors:https://biorxiv.org/cgi/content/short/2019.12.12.874586v1 …
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A few years ago we started sampling from swordtail hybrid populations we hadn’t previously collected from. We were surprised to find that many individuals had unusual melanin phenotypes emanating from spotting patterns on their fins.
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We used a variety of approaches to fine map the genes involved in this incompatibility, ultimately identifying an interaction between cd97 and xmrk. This was surprising because xmrk causes melanoma in a distantly related swordtail cross, that does not hybridize in the wild.
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We also found evidence for strong viability selection against the melanoma incompatibility in natural hybrid populations. Puzzlingly, the melanoma is maintained at moderate frequencies in some populations, which we are excited to dig into in future work.
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Thanks to @moorjani_priya @molly_przew @Hakha_Most @FraserLab and many others for helpful discussions along the way!pic.twitter.com/bDXvZdmaAI
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