To cross this would be my plan of action.
- Breed them firstly.
- Rear away from all other guppies.
- Remove all males as they develop.
- Breed one or two virgin females with the male you want.
- Keep here and her fry away from all other guppies.
- Wait for the results.
The first generation of fry will not display the lyretail (feather fin) gene however the they will be carrying the genes.
A brother sister crossing from the F1 fry will then result in 50% of the fry showing the lyretail, 25% not showing it but carrying the gene and 25% with no copies of it.
So from the F2 generation back crossing a lyretail female with the best F1 male will result in 75% expressing the lyretail tail and 25% not but all carrying the gene.
Now you can allow any male to breed your know they will carry the gene.
So selecting the colours would now be the goal.
Good luck m8
Also guppy meeting this weekend in Nottingham and I'm now going