Originally Posted by indjo
Not all RT are deformed. But they are likely to be carrier of deformities. Problems usually arise if you breed a RT x RT or RT x 8 ray. That's why I said it's safer to make your own RT. Then you'd know how and what it's bred to - I don't trust bought RT because I don't know it's background. And by chance I got a bad carrier which gave me deformities for generations - making me fear them for breeding.
Like DT - not all are deformed. But they're most likely carriers.
8ray x 8ray = RT (F1) mild carriers
RT x RT = Many will physically show deformities and the genes will be stronger (F2)
RT x RT = More will physically show deformities and the genes will be fixed (F3)
The more you inbreed, the worse it gets. Though not 100% will show deformities, but 100% will at least be severe carriers in F3 and will pass it on for generations.
Since RT often have small/thin rays, it would be best to cross them to thick ray/finned and with fewer branching. Hopefully the deformities will not stick to your line. Then later, take the 8 rays and inbreed to get RT again - like DT. So it's constantly an in and out breeding process.
I agree with this completely.
In every spawn with DT I get half deformed DT's with bad spines and half regular DT's, but I still know the value of the DT in halfmoon lines.
If we never bred DT's into our halfmoon lines because they are technically deformed and always produce more deformed fish, we would not have the beautiful halfmoons that we do today.
Rosetails are just as important to the halfmoon line as DT's, whether some know it or not. I also don't think that the RT mutation is as bad as the DT when it comes to producing deformed fish. It's almost guaranteed in a DT spawn to get at least some bent spines but in a RT to HM cross you can have an entire spawn with no deformities.
IMHO people are jumping the gun on the RT and I am happy to fill the void till everyone else catches on to the importance of the RT.