Male fertility question ?

[domenech69]

I know male ZZ are fertile. I want to know about male fertility of ZZ crosses and in what generation F1 or F2 back cross.

ZZ x Kamfa
ZZ x Texas
ZZ x Carpintis
ZZ x Midevil
ZZ x Synspillum
ZZx Bp

 

[sarmatian07]

I know male ZZ are fertile. I want to know about male fertility of ZZ crosses and in what generation F1 or F2 back cross.

ZZ x Kamfa
ZZ x Texas
ZZ x Carpintis
ZZ x Midevil
ZZ x Synspillum
ZZx Bp

F1 ZZ x Kamfa must be fertile, other options on the principles described here https://www.monsterfishkeepers.com/forums/threads/looking-for-vieja-hybrids.557156/