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-   -   Halo Corn Snakes (https://www.cornsnakes.com/forums/showthread.php?t=145967)

scmartin27 05-21-2018 10:54 AM

Update photos
 
4 Attachment(s)
Photos 1-3 are of the yearling Halo vs the Green Blotched.
Photo 4 is of my adult Halo female who just laid another 8 eggs (same number as last year).

pitzMike 01-30-2020 11:15 PM

Any updates?

scmartin27 02-04-2020 11:10 AM

Update... Sort of?
 
5 Attachment(s)
Here are some pics I got really quick with my phone the other day - Halo male, his sibling GreenBlotched female, and a regular "Run of the mill" white snow who I'll be breeding to the GreenBlotched to try and prove if this Halo yellow is actually an incomplete-dominant gene. I have one other female halo (mother of the Halo in pic 1 & the GB shown here), as well as a young male RedFactor Halo who I'll also be breeding - probably to each other (pics 4 & 5).

SnakeCreations 02-04-2020 08:40 PM

Quote:

Originally Posted by scmartin27 (Post 1739884)
Here are some pics I got really quick with my phone the other day - Halo male, his sibling GreenBlotched female, and a regular "Run of the mill" white snow who I'll be breeding to the GreenBlotched to try and prove if this Halo yellow is actually an incomplete-dominant gene. I have one other female halo (mother of the Halo in pic 1 & the GB shown here), as well as a young male RedFactor Halo who I'll also be breeding - probably to each other (pics 4 & 5).

These are lovely, Sarah!

-Tonya

scmartin27 01-27-2021 02:17 PM

2020 Hatchlings Update
 
No photos in this update, BUT I hatched 11 snows from the Green Blotched x Normal snow pairing in 2020. All but ONE have been determined to be halo. The one that isn't determined yet has high frosting and little to no saddle borders, so it will be months, or maybe up to a couple years, before I know for sure if she's halo or not. I assume she is halo, but her haloing, or lack thereof, will be the deciding factor on whether Green Blotched is the homozygous form of this mutation, halo being the heterozygous form. I'm unsure if I want to repeat the GB x Standard breeding this year, or breed her with something else (another halo, or even something completely different).
I'm holding back a pair of known halos from this pairing, though, and Will eventually post photos of all of them.

scmartin27 03-26-2021 01:43 PM

Post 2020 update
 
After looking over all 11 babies from my 2020 Green blotched snow x [regular] snow ALL babies display halo borders, with very clear areas of the saddles that are not going to yellow.

This confirms my suspicion that Green blotched is the Homozygous phenotype and Halo is the heterozygous phenotype. At least as far as I have interpreted the information we have so far.

I bred a Halo male to 2 non-halo females last season also (both amel types) and some of the amels from those breedings are beginning to show yellow flecks in the borders as well. But not all of them. So this also seems to be a sign pointing to it being a Co-Dominant mutation.

I say Co-Dominant instead of incomplete-dominant because of the way the colors are presented. The yellow is either all throughout the saddles & in the borders (green blotched) or only in the saddle borders (halo). This differs from mutations like pamletto, which is a hypomelanistic type in het form but a leucistic type in hom form. So to me this seems more similar to the co-dominant type of phenotypes than in incomplete dominant phenotypes.

If I remember biology class: co-dom with red & white flowers produced flowers with some red stripes and some white stripes; inc-dom with red & white flowers produced pink flowers. In this case: full yellow x no yellow produces areas of some yellow and areas without the yellow.

Anyone's thoughts on this are welcome! I am still going to be working with the gene. This season I am breeding Halo x Green blotched siblings and will hold back the babies a year or so to see how they develop. I will also be breeding the halo male to an okeetee who has wild caught ancestors not too far back (grandparents, i believe). Not as good as breeding to an actual wild caught, but I will take what I can get for testing.

scmartin27 12-15-2021 04:46 PM

update on the 2020s
 
It has been over a year now since the 2020s have hatched, and I am now questioning my original belief of incomplete-dominance.

The female of the pair that I kept from 2020 is now showing the yellow very heavily in her saddles, with no discernible pink - Unlike the male who has a very stark contrast between his yellow borders and pink saddles.

I still believe it is dominant in some capacity. But it isn't as simple as "Breed a Green Blotched to a normal and get 100% Halo babies."

Here's an overview so far, after reviewing I am hoping someone can give their thoughts (keep in mind all of these are snows):
Halo x Normal = mix of Halos and Normals
Halo x Green Blotched = 100% either Halo or GB
Halo x Halo = Halos, GB, and normals
GB x Normal = Halos & GB [referencing the 2020 babies]
GB x GB = ?? (I have personally not done this breeding... hard to find a GB male...??)
Normal who produced Halos with a halo or GB x same = Normals. [i.e. not a recessive mutation]

I wonder if it's sex-linked somehow, perhaps Dominant in females but Incomplete-Dominant in males? I look forward to everyone's thoughts.

Rich Z 12-15-2021 06:24 PM

Using digital definitions in an analog world has always been pretty messy. :)


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