This message is from: [EMAIL PROTECTED]
Only Fjords that have a copy of the cream gene can create White Duns - so
that'd be Whites, Yellows, and potentially a Gray or two (as Gray dun "masks"
a
single cream gene). Short of a spontaneous mutation, you'll never get a
White from two Browns, or a Brown and Red, or two Reds.
Re: White and patterning genes - many are dominant, and can cause
defects/death in homozygous form. Dominant White, Overo, and Roan in horses
are
all homozygous lethal; Roan prenatally...I don't recall about Dominant White,
I'll have to look that up. Interestingly (to me anyway - LoL) there are genes
in my dwarf hamsters that work the same as with horses - Platinum causes
white ticking (like Roan), and is also prenatal lethal. Mottled causes white
patches like Overo, and is also postnatal lethal.
Ruthie - Did you get my message about the White German Shepherds?
Jamie
In the Mountains SW of Denver, CO
In a message dated 8/12/2006 1:13:34 P.M. Mountain Daylight Time,
[EMAIL PROTECTED] writes:
So your thinking is, that only a white dun can have a white dun, or a white
dun and a brown dun probably? Is there ever a white dun born to both brown
duns? I think someone touched on this before, maybe you, but I just want to
make sure I have it right.
The reason this interests me is because I just went through this with a dog
breed I'm into. I tackled the color theory but soon discovered it was very
complex and had different formulas for different breeds! What applies to one
breed, for creating white, doesn't necessarily apply to another breed.. and
sometimes it's not a bad thing, and sometimes it is! ?!?
Same with horse breeds I believe, with some of them it is a bad thing and
25% of their offspring don't make it, but with the Fjord breed it is a
different kind of occurrence I am told, hence my interest.
My dog breed study, re: white, is surrounding a herd breed that has white
accents (bib & paws) normally occurring.. ordinarily called piebald white I
believe. But every once and again there will be a litter of total white pups
born (sometimes half a litter--but all white bodies) born to colored parents
(?!)...which occurrence is a non-standard irregularity. I began to wonder
that maybe it could be a marker for inbreeding as it only occurs when there
is a particular dog way back in both pedigrees ..and if either dog is again
mated with a different dog, all is well (no marker match). sorry to digress,
but wanted to amplify my interest. I am back to square one on the subject.
If anyone knows of further information on the study I'd love to hear about
it.
