Quote:
Originally Posted by snakepunk
So Dave, are you saying that there are two forms of strawberry, with one being polygentic? If so, what's the difference phenotypically?
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I'm not stating there are.
I'm stating that there appear to be.
I don't know the full genetic history of the individual snakes which were used to verify the 'strawberry gene'.
I do know that (from conversations with Jeff sr. at JMG) that the "strawberry" which was used back in the early formulation (f5 back or so) of the CG/SS -
-was a linebred trait which was developed by selective breeding and removal of non-strawberry-red stock from the original project to produce the first non-gene-strawberry-colored snakes.
This next portion is NOT inclusive of Bloodred/Diffused ,
I think a lot of persons have already shown that breeding a red snake to another red snake produces red snakes. Then any non-red snakes are discarded from the project, and F2 yields more red snakes. To put it another way, if you take a hundred different looking people of all races, eye color, hair color, foot shapes, etc, (assuming they do not have racial issues) and place them on an isolated island, and come back several generations later, they'll collectively look more similar then they did when dropped off there. After some more generations, they'll all look even more alike. Sure, there will still be the occasional recessive gene which pops up here and there, but the same is true for wild snakes. This is true of all locality types of snakes; they stay within a geographical region and so they begin to all look alike. For example, if one goes to the region where gray base Miami corns are found, they are all gray base-colored, but the farther away you go from that place, the fewer wild corns will have that gray base color. What I am describing here is genetic, but does not necessarily mean any one specific individual gene is responsible for their visual color.
So you take a w/c gray base Miami and breed it to an orange base-colored w/c central florida corn, and half the babies come out with gray base, the other half come out with orange base color in the F1.
This does not prove that gray base or orange base are co-dominant. It simply shows you that half of the parents of the offspring were either orange or gray base.
I suspect, it appears to me, this assertation that strawberry goes co-dominant in the F1 is not necessarily what is
always actually going on, though it has been said a lot on forums and repeated a lot elsewhere. Then in the F2, sib to sib will produce the typical punnet square result, or F1 X either parent will produce the punnet-predictable results. But until someone actually takes the time to prove or disprove any of this, it's never going to be really known. In the meanwhile we'll be mixing up a lot of genes and traits even further, so much of the cs stock in existence is so far from whatever it originally was, etc.
The last couple paragraphs in
this post are possibly related to the concept of this red stuff being a trait.