I have often wondered if the checkerboard king was a wild phenotype of a certain locale that happened to pop up in a captive program. If that be the case, then there is a population of them somewhere.
This is what I think based on what I have seen and evaluated. The checkerboard king is in fact a true co-dom morph that effects approximately 50% of the offspring. I base this on the fact that of the clutches I observed in Daytona, there were no in between animals. Either they expressed this extreme variant phenotype or they didn't. Anytime you cross different locale types of the same species there are usually types of both extreme in the clutch, including in betweens. If I bred a multi-speckled LA king to a heavily banded MS king(which are never multi-speckled from my experience) then I'm sure I would get a huge variance of offspring.
These checkerboards seem to either express it or not, and the ones that don't do not carry it. That leaves it to possess a co-dom nature.
One thing I haven't quite figured out is the huge degree of variance among the normal appearing siblings. None of them express the checkerboard trait, but they are so variable. This could be due to a mixed lineage, or it could just mean that the checkerboard gene also effects the normal offspring in some way without carrying the gene over to be passed on.
I'm not a geneticist, but these are my observations.
On another note. The checkerboard king I have is incredibly heavy for her age. From the little I know about desert kings they are generally slightly more slender than holbrooki. This girl is freaking enormous to be so short, which would be more typical of holbrooki or floridana. BUT the small size rules out FL altogether. She is small for an '03, but her weight and girth would lead me to believe she is a holbrooki of some sort. The other checks I have seen were the same way. rather short and thick.......nigra??? Possibly? I don't know? If they are intergrades(which I DO believe albino holbrooki are) they are still of a co-dom nature. Just some thoughts.
Oh, and I really have no interest for the checkerboard girl in my collection. To be honest all I want to work with are true locale types collected by myself or close friends, with the exception of a white-sided colony one day.