Posted: Jan 05, 2023 8:40 am
by Calilasseia
Spearthrower wrote:
Calilasseia wrote:
The first surprise the paper has in wait for those not aware of this fact, is that domesticated Goldfish are tetraploid organisms. The diploid ancestors produced offspring that had two copies of the genome, which then differentiated so that the tetraploid genome is asymmetric.

I did indeed not know that: did tetraploidy come about through artificial selection or was it already in their wild carp ancestors?

Tetraploidy appeared in ancestral Cyprinids some time ago. One of the more interesting discoveries I made when trawling through the goldfish genetics literature. :)

More on tetraploidy in Teleost fishes can be learned here, and in this paper on Cyprinid tetraploidy.

EDIT: And a third paper can be found here.