George,
I feel that we owe a lot to Casey Lazik and some others for they are responsible for what we have today. There are an unknown amounts of bloodlines today and some just use names of the past to sell there stock. You ask - How many generations have been selectively breed for low/no melanation? I feel that is a desire of some today like Will Leary and others. The german Bloodlines - Schuett may be best known for this and is at the 4 generation if not soon. We have a 11 year old that looks like some peeked 3 year old and he still breeds. We have seen many jungles over the years and they were never at the level they are today. Some exceptions. But with the selective breeding these days it will only get better and that is one of our goals. A clutch "ugly ducklings" yes, we all have them and they find homes as beauty is seen through the eyes of the beholder. They just don't color up as fast or have a less than desirable pattern.
What we look for in selecting holdbacks? - Well, early on Matt would purchase whole clutches and raise them till there were ones that stood out. Now we like to see the parents as some indication but we look for classic bands, that are clean and no casting of smudging. After the 3rd or 4th shed is when we have a better idea if it will look good. Just look closely at the clean area and then the black. There tends to be a 3rd color in the black area that is varied by scale. This color in time tends to turn yellow as well, so look for that as it adds a nice look to the animal as they age.
Our stock is varied with 6 different bloodlines that we know of.
There are others out there with great stock and some we never hear much about.
We love this morelia and working with it is a privilege and hope its growth in popularity continues over the years.
Hope that answered a few of your questions.
Kind Regards,
Selective Origins