When I first got into bettas I bought a couple pairs from a local pet shop to practice with till I got it down and then got online and bought a couple good pairs. I figured it was better to work with the cheeper fish till I KNEW I could do it right rather than spend alot of money and fail or loose a fish, which we all know sometimes happens when spawning bettas. LOL
I'm a bit rusty on my betta genetics, which is bad cause I studied hard and bred them for years, but I have an older copy of the IBC's Technical Assistance Library that has tones of info on it. I'll try to find time to dig through it for the genetic information soon and try to get it posted on my website. May take a while cause theres hundreds of articles in it to sort through, but I'll have it up and posted eventually. I've been rebuilding and updating my site so some of the pages are down right now. Takes alot of time and patience to put those things together sometimes as I try to make it as easy to understand as possible. You could try searching "Betta Genetics" online and see what comes up.