Kathryn Tosney is a developmental biologist at the University of Michigan. She's working on a study of inbreeding in bearded dragons but more as a hobby than an actual research project, I believe. She imports beardies from Germany where there is less morph-craziness to compare with high-colored bloodlines here in the US and compares embryonic development.
Here is one of her hypotheses she posted on the Pogona newsgroup about a trend she's noticing in the inbred dragons she's been studying:
It's a fairly controversial hypothesis because broken tail rings are often seen in animals that appear perfectly healthy. But inbreeding causes changes on a cellular level first so it can take many generations to show external defects.