Marble Eye

Marble Eye is a recessive mutation founded by SaSobek Reptiles in 2006.

Discovering the Mutation:

In 2006 while feeding some of the geckos left over from the White Plains show in New York, I noticed something a little different about one of the sunglows that hadn’t sold. Its eyes looked redder than normal. After taking a picture and zooming in on the eye I noticed it was like nothing else I had ever seen. The eye looked like what you’d see if you were looking through a kaleidoscope. I checked all the geckos from that breeding group and found two more. I frantically called Alberto Candolini (of A&M Geckos) and told him the news. We figured out who the parents were and that Alberto still owned them.

2007 – Proving Out the New Genetic:

After finding this needle in a hay stack the next step was to prove out what it was. Unfortunately all of the geckos expressing the trait were female. But we did have the father and the two females that were in the group that they had hatched from. So in 2007 we bred the “father” to the daughters that were expressing the gene. One female didn’t breed her first year. The other two gave me duds for the first two clutches and started to get me nervous. Finally I started to get good eggs out of them. I hatched out one male and five females from the two females expressing the trait. None of them had any unusual eye pigment. The two females that were the “mothers” when bred to the “father” didn’t give me a single eye pigmented gecko. At this point I was thinking “well it would have been cool to make more”, but I just didn’t think it was going to happen.

2008 – One More Year:

With the start of the 2008 season, I knew I was going to give it one more year to see what I could do with this project. I had the three original females that were expressing the eye pigment and I had 1.5 (one male, five females) of what I was calling “hets”. I was counting on it being a random genetic mutation that happened or somehow the “father” of the unusual eye pigment maybe just wasn’t the dad. So I bred the son “het” to the females that were expressing the trait and to the females that I was calling “hets”. I got eggs, eggs hatched, and poof, more marble eyed babies. So at this point I knew I could reproduce it and I knew it was acting recessive.

Now to prove it against the most famous eye pigmentation out there: the Eclipse gene.

2009 – Testing:

In order to prove that this was a trait that could be reproduced, I knew that I had to do three things. One, make sure that this was not related to the Eclipse gene at all. Two, out-cross for the benefit of the gene. There were no signs of anything negative but I didn’t want the gene pool to get too small. The third thing was to get the Tremper albino gene out of them so I could cross them to the other strains of albino.

The first was easy: Cross the Marble Eye to Eclipse and see what happens. I did this in two ways. I bred the original females to a Mack raptor. I also bred the male Marble Eye to some eclipse females. More than forty babies hatched and there were no eye pigmented geckos at all. At that point I knew there was no Eclipse gene at work in producing marble eyed geckos.

Steps two and three were easy as well. All I would have to do was to breed the Marble Eye to some subspecies. I chose the E. montanus for my out-crossing. By using these F1 geckos I could make sure that they were not related to any other geckos out there and I could start cleaning the Tremper gene out of them.

Another thing that I noticed about this new mutation was that the amount of marbling was very random. Some had tons of eye pigment and others very little. I’m sure there are even geckos that are not showing any eye pigment that for breeding purposes could be considered marble eyed individuals. So in that aspect I think that it works like the eclipse gene in that you can’t control the amount of eye pigmentation. ^[1]