Seamus Haley
Big Game Hunter
Unfortunately there's no real way of telling where the defective gene (if it is genetic, evidence strongly suggests it but it has yet to be proven) originated without some serious, intense leg-work... Contacting every breeder/dealer who has an animal displaying an eye problem and then trying to trace it backwards. I suspect that most people would be unwilling to talk about the situation, since asking "Did you produce an animal with this deformity?" and "Who did you sell it's siblings to, who did you get it's parents from?" could easily be mistaken as a slight against their quality... It is in some ways- most people know that continued propogation from animals related to the problem is wrong, they just ignore it for the money that there is to be made.
Further, the problem seems really wide-spread, it's not a situation where there's one identifiable breeder who's constantly producing animals which have the problem, it's cropped up in many collections. What this implies is that the defective gene was likely introduced early on in the project and, as Alvaro said, it was likely unintentional. There are some conditions which have a genetic cause but can't be expressed as a simple recessive or codominant trait, they are simply quantitative... Kinda like... breeding a beardie with more red in it to another with more red than normal will result in neonates which have more red... Chances are good that this eye defect is similar, added to the gene pool through an animal which appeared completely normal, reinforced over a few successive generations, still without displaying itself and eventually becoming strong enough to start showing up.
Problem now is identifying which animals have it and which ones don't... Since outcrossing often involves animals sharing the same trait, but having the same origination... (Single albino boa which originated the line) it gets into multiple breeding groups. Add in the fact that most people selling offspring won't mention that a sibling had an eye defect or that last year the same adults threw a few with eye problems when selling neonates which don't have the problem...
An easy parallel can be drawn to leucistic texas rat snakes... The bug eye condition is a defect with a genetic cause... It's become widespread though, even when crossing two animals not showing the trait, their offspring can end up bug-eyed.
Early culling is the only solution but I suspect, even though it's the ethical choice of action, it's not going to happen. If it's allowed to continue though, more and more albino boas will have this defect, until it's being displayed by a good portion or possibly even the majority of the population.
What's worse... A lot of people seem to have no concept of the different albino strains. Since many "breeders" these days seem to think that proper selection of animals means "Dis one I gots right here an' dis odder one I dun seen fer sale cheap." it's only a matter of time before someone starts producing hets for both khal and sharp strain albinism which are carrying the defective genes, introducing them to other albino populations.
Further, the problem seems really wide-spread, it's not a situation where there's one identifiable breeder who's constantly producing animals which have the problem, it's cropped up in many collections. What this implies is that the defective gene was likely introduced early on in the project and, as Alvaro said, it was likely unintentional. There are some conditions which have a genetic cause but can't be expressed as a simple recessive or codominant trait, they are simply quantitative... Kinda like... breeding a beardie with more red in it to another with more red than normal will result in neonates which have more red... Chances are good that this eye defect is similar, added to the gene pool through an animal which appeared completely normal, reinforced over a few successive generations, still without displaying itself and eventually becoming strong enough to start showing up.
Problem now is identifying which animals have it and which ones don't... Since outcrossing often involves animals sharing the same trait, but having the same origination... (Single albino boa which originated the line) it gets into multiple breeding groups. Add in the fact that most people selling offspring won't mention that a sibling had an eye defect or that last year the same adults threw a few with eye problems when selling neonates which don't have the problem...
An easy parallel can be drawn to leucistic texas rat snakes... The bug eye condition is a defect with a genetic cause... It's become widespread though, even when crossing two animals not showing the trait, their offspring can end up bug-eyed.
Early culling is the only solution but I suspect, even though it's the ethical choice of action, it's not going to happen. If it's allowed to continue though, more and more albino boas will have this defect, until it's being displayed by a good portion or possibly even the majority of the population.
What's worse... A lot of people seem to have no concept of the different albino strains. Since many "breeders" these days seem to think that proper selection of animals means "Dis one I gots right here an' dis odder one I dun seen fer sale cheap." it's only a matter of time before someone starts producing hets for both khal and sharp strain albinism which are carrying the defective genes, introducing them to other albino populations.