The breeding of WF Blondes and for any color varriation was not understood... at least not to what we know now.
As to the White Faces.... Sandridge did a lot of close breedings in the first couple of years in developing his foundation line. Waiting lists for these Blondes were long.
None of us knew if the gene was simple recessive or dominant much less co-dominant. Shoot... I could not even pronounce the word Hetrozygous or Homozygous or even Leucistic.
Unfortunately we did not know there were No Hets for WF Blonde either. It was all a guessing game at first.
In fact, when I did the first breeding of my little Leucistic (Sesamie) to a WF Blonde (Sandman) I was in hopes of producing a color much like the Creamino but without the red burgandy eyes. Boy, was I ever off base there.
Some of the information on how to figure out how some of the genes were working came from snake breeders who were breeding Dominant, Co-Dominant and Simple Recessive colors which fall in line with the Pundent Square. I personally have not learned yet how to figure out some of the more complicated codes yet but as a New Varriation pops out... by only breeding can we all learn.
Now, why all the inbreeding of the WF Blonde? Like any new Varriation that is being discovered... one has to Inbreed to develope a foundation line and then linebreed and from there breed out. Most of us breeders resorted to linebreeding with only a few breeders breeding a few pairings that were consided inbreeding. Some of these close inbreedings did produce a noticable lightness in the body coat. It was also noted that by pairing two White Faces together the percentages of producing WF Blondes did increase chances of producing WFB offspring more often. And within a few years... it was noted that there was no such thing as a Het for WFB. Otherwords... like we say when breeding the Mosaic... what you see is what you get.
Now the Leucistic.... Three lines and three lines only.
1) Mickey and Minnie, 100% Leu Hets were bred by a Candian breeder trying to produce White. These two gliders are Brother and Sister. Their father was a Ethan a BEW. Then there was an Uncle named Gabriel (name changed later to Stewart) and Fizsban. All brothers and I beleive produced by the same father but different mothers (Forgive me if I am wrong).
2) Sesamie and Sammy, brother and sister twin Leus from unknown het to het breeding. I purchased the tiny female and Sheila then purchases the little boy.
3) Mac and Cheese often refered to as the Dai Green gliders. Dai only produces 100% leu Hets and mosaics with not a lot of white on them all from Mac and Cheese(BEW). She does not breed any of the offspring in the six years that I knew of her breeding nor does she purchase anything to produce white. Dai wanted to produce sound foundation gliders so did not do any inbreeding. Because her breeding program started befor mine did... she did not know at the time why her Platinum Mosaic and Wild Caught BEW could not produce a BEW offspring. In the last few years of her breeding... the mystery was solved. Her Platinum glider did not carry the Leu gene. So, all of her gliders were either mosaics with not much white or all 100% Leu Hets. Here is where I need help.... I think Dai did produce one BEW but exactly how I am not sure. Fizban and one of her offspring? Have to ask Sheila about this one. Anyway... with only breeding 100% Hets and not breeding to anything else... Dai's Program was really at a stand still.
Ok... now Canadian breeder sells BEW named Gab. This male only produced two hets that I know of in his short lifetime.
After Sheila and I purchase the Twin BEW babies, about a year or so later... the Canadian breeder offers Sheila the 100% Leu Hets with two offspring, one BEW female(Sheila names the girl Saline)and I purchase the Possible 66% Leu Het brother of whom I name Shy Baby.
Shy Baby is then permanently paired to Sesamie. Their first BEW offspring is named Tai Pan and he is close to 2 years being oop Tai Pan is then paired to Gabby who is a 100% Leu Het from the Mac and Cheese (Wild Caught BEW)lineage. A sister to Tai Pan, Tiki is produced and paired to Whisper a 100% Leu Het out of Ethan and Eileen. Then Cry Baby who is produced by Tiki and Whisper is paired to a Normal named Honey. I purchase back from Sheila a BEW named Schezwan... who is a Grandaughter to Sesamie and Sandman. After four years of breeding... my foundation line as to my breeding of the BEW was now in place.
So... as you can see, 2 out of 3 of the seperate lines of 100% Leu Hets did not produce much in Leucistics. Lots of 100% Hets but few Black Eyed Whites. It is only when all three lines where merged together did I begin to produce Black Eyed Whites who were not inbred.
I never did any Inbreeding.... no brother/sister or parent/sibling pairings. My breeding program was to produce sound Leucistics and 100% Leu Hets that were not inbred with the younger breeder picking up where I have left off with linebreeding and then even more distant linebreeding. As a small breeder with only 15 pair of gliders I am very limited on space along with my limited physical capabilities of being responsible for caring for more gliders than what I already have.
Food for thought...
A really good way to help one understand the beginning of developing a new Color Line is to read up on the Creamino Varriation. This newest color began with two young gliders who could not be sold due to loss of their tails and were paired together. Keep in mind the breeder below has LOTS of Space for holding Hets and lesser Hets that will be bred bred into thier line.
Unknowlingly, these two unwanted gliders were both 100% Albino T+ Hets which produced a pair of sisters close to five years ago who were T+ Albinos that we know as Creaminos. Because they were Albinos the breeder was advised by a genetist not to pair their foundation gliders any closer than first cousins on each side of the pedigree. Otherwords... do not do any brother/sister breedings or father/daughter nor mother/son which is considered Severe inbreeding due to possible defects from the Albinos damaged chromozone. Thus Normals and WF Blondes have been introduced.
This breeder is now breeding fourth and fifth generation Creaminos and Hets.