White Sire X White Dam crossings

[Jorge]

Back in the 1970s when famed French breeder, Madame Elisabeth Couturie, began crossing the white TB sire, Mont Blanc II (1963), with the blue-eyed, non-TB gray mare, Fanny (because she didn't have at hand another white mate), and eventually went on crossing Fanny's white progeny with their own sire (Mont Blanc), thus achieving repeatedly viable non-lethal white products, there have been no other recounts on breeders trying to repeat these crossess (white mates).

If one adds to this scenario the curious circumstance that practically we have never seen breeders of white Thoroughbreds enthusiastic about crossing their in-house "cropout" white lineages with other breeders' "cropout" whites, we then have to conclude that there is much
unexplored terrain to cover, and much experiences to share as to plainly discard these crossess.

Unfortunately, Madame Couturie passed away during this period and her experiments were ultimately not followed (including racing one of Fanny's white descendants). But as far as she advanced, this topic deserves being seriously explored or at least discussed here.

Would really like to read the perspective of all of you.

Thanks for your participation.

[xfactor fan]

Jorge,

From what I can gather about Dominant White, is that any given DW mutation is a homozygous embryonic lethal.

So if two horses with one copy each of the DW5 mutation were crossed the possibilities would be solid, DW5, and pre-implantation death for the embryo that was DW5 DW5.

What gets interesting is crossing two different DW mutations. Lets say DW5 and DW9. It will depend on just how the KIT mutation affects the metabolic pathway. If the action of each of the different mutations is similar then it will most likely result in early embryonic death. However if the mutations are different enough then there is a chance that the embryo could survive.
But most of this is speculation, and no one will know for sure till there are some test breedings.

[Jorge]

Jorge,

However if the mutations are different enough then there is a chance that the embryo could survive.
But most of this is speculation, and no one will know for sure till there are some test breedings.

especially the part reading "and no one will know for sure till there are some test breedings."

[Jorge]

Would really like to read opinions also from our coat color breeders. Let's read from you.

[Derby Lyn]

You get me a white puchilingui mare and I will be happy to try the cross for you I'd even take a young white filly by The White Fox and wait a few years

[Jorge]

Sounds like some sort of "E-Harmonious" service (where the "E" stands for "Equine"). Hey, sounds like Directs Unique One (wherever he is [?]) may get jealous!

[Jorge]

Too much silence?

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