How do Sinocyclocheilus genomes record cave life?

Sinocyclocheilus cavefish genomes reveal troglomorphic adaptations such as eye degeneration and albinism, paralleling and differing from Astyanax.

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What adaptation context is studied?

Cave adaptation / subterranean life.

What characters puzzle biologists?

Troglomorphic characters.

Classic comparative model mentioned?

Astyanax mexicanus (eye loss/QTL work).

What regressive traits are listed?

Eye degeneration, albinism, rudimentary scales, low fecundity.

Any constructive cave features?

Gene expansions suggest traits like enhanced taste evolved in caves.

Where is Sinocyclocheilus endemic?

China’s southwestern karst area.

Pigmentation mechanism note?

Different mechanisms of albinism compared with Astyanax.

Expression pattern for some eye genes?

Down-regulated in cavefish (Sa), consistent with other cavefishes.

Teaching point?

Independent cave invasions can share phenotypes via partly different genetic routes.

Best topic?

Natural selection / adaptation genomics.

Why genomes help?

Provide whole-genome data to unravel subterranean adaptation beyond prior models.