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Chronology of the discovery of the pearl gene
(Using date-stamped email, only, at this time. Other sources are requested!)With apologies, this webmaster (Barbara Kostelnik) will be only using the resources available
to her, as this page evolves. |
| (Need date) | "Spud" is suspected of being a previously-unknown dilution |
| Oct 17, 2001 | Barlnk Peachs N Cream is suspected of being champagne (Carolyn, who contacted you about her? Or did you run across her somewhere?) |
| Nov 15, 2001 | Barb Kostelnik writes to the ICHR list that she's found an Iberian foal, by Q, that looks champagne (Majodero, a Lusitano/Andalusian cross). (He was called an Andalusian by his breeders on this page: Rainey Valley Farm) |
| Oct 17, 2001 | Carolyn Shepard sends the ICHR list a picture and pedigree of Barlnk Peachs N Cream, a "palomino" with only "sorrels" in her pedigree, thinking she must be champagne, based on her appearance, but unable to justify it by her pedigree. |
| (Need date) | Barlnk Peachs N Cream is "tentatively" registered with the ICHR as Gold Champagne (#0044) |
| July 27, 2002 | Barlink article published in Champagne Horse Journal by Carolyn Shepard (is this date correct?) |
| May 2003 | Celeste Plitz sees an unexplained-dilution foal at Suzan Sommer's
Ranch
(Tequila). Rebecca Barrington was there the same year, and says he was a grown horse then. |
| ~October 2003 | Champagne Horse Journal publishes Carolyn Shepard's article "Champagne Delusions", in which she mentions "Spud factor". |
| Nov 15, 2003 | Carolyn Shepard writes in a private email to Barb Kostelnik that Majodero may carry a previously-unknown dilution gene, similar to Barlnk Peachs N Cream |
| Apr 14, 2004 | Barb Kostelnik starts the newdilutions list specifically to study unknown
dilutions (and for quite a while the list was mostly about this specific dilution.) |
| Aug 5, 2004 | Deb Morgan replies to Barb's question about Champagne in the Peruvian Paso, saying that she has pictures and pedigrees of an unknown dilution factor in the breed (which she knew wasn't champagne) |
| We all share pictures and pedigrees of many horses of the previously-unknown, recessive dilution on the newdilutions list during these intervening years. Owners of horses of the new dilution vote to call it "pearl". | |
| October 2006 | UCDavis announces it has discovered the location of the "Barlink" gene, and has a test for it, calling it "apricot". |
| October 2006 | Carolyn Shepard pulls hair from Guindaleza R, having driven to Acton, CA with Barb Kostelnik, and sends it to UCDavis, which discovers that "Barlink" and "Pearl" are the same gene. |
Here are a few emails that "date-stamp" when certain communications occurred concerning the then-unknown dilution gene. I think I need to undo the separation between Iberian and Paint to make a better-flowing story...
Barb finds an Iberian foal that looks champagne:
ICHR @ YahooGroups Message
#10826
Thu Nov 15, 2001 12:49 pm
subject: oh, boy....
http://www.raineyvalleyfarm.com/sale_barn/majodero.htm
They're calling this foal of Q's an Isabella. I wonder if that
is in the
French sense, or if he later shed out to pale yellow with a
white mane &
tail. You better believe I'm writing this breeder IMMEDIATELY...
;-) In
fact, I just did.
BarK
Carolyn Shepard first said "unknown dilution" in relation to Majodero
On 7/15/2003, Carolyn wrote in a private email to Barb K.:
"(His owner had Majodero) color tested at UC Davis. He's a smoky black. She sent a copy of the report. Most interesting...... He's aaEeCrcr. So he's got some other dilution in there. And I don't know what it is. Shades of Barlnk Peachs N Cream. Maybe the purpose of the ICHR is to discover additional dilution genes that nobody ever knew about before. What should we call this one? The Epoca Factor?"
Also in regard to Iberians: Celeste Plitz first saw Tequila at Suzan Sommer's ranch -- UPDATE: I believe it would have been May 2003. She apparently received pictures from that visit in January 2004, and so I'm guessing she would have started sending pics of Tequila to the lists, etc. sometime soon after that. (from searching through old emails/posts) I think he was only the second unexplained Iberian dilution I had heard of, at that time.
I see that I started the newdilutions list on April 14, 2004 -- Barb (webmaster)
Carolyn Shepard finds an unexplained "Palomino" that looks champagne...
Message # 9038
"Carolyn Shepard" <equine-ea@tcsn.net>
Wed Oct 17, 2001 8:01 pm
Carolyn Shepard begins to see a pattern of unexplained dilutions among the Barlink Ranch's horses:
Message #16377
Hey, guys. In this job, I get to see a lot of interesting
horses.
Occasionally, I will notice a "trend." Remember Barlnk Peachs N
Cream?
The mare I gave the tentative ICHR registration number to? She's
44T on the
stud book page. Well, she's from two chestnut parents. She had
some rather
convincing photos, and just not knowing what to do with her, I
gave her a
"tentative" number which means she has to "prove" herself before
she gets a
"real" number. I even paid for her DNA parentage verification.
She passed.
I was wondering if she was some kind of mutant......
Well, then - someone sent me a photo of a cremello foal, and
they were
wondering if it was champagne. One parent was palomino, the
other chestnut,
and closely related to the dam of Barlnk Peachs N Cream. Hmmmmm.
Then I
was sent photos of ANOTHER cremello foal, with a palomino sire,
and a dam
related to the dam of Barlnk Peachs N Cream.......... Okay.
That's a
"trend." Something is going on here!!!!!
Anyway, photos of skin were traded, stories were traded. We
waited for
the cremello foals to get dark skin, and turn into palominos.
They didn't.
I talked to Wendy Bockman. She informed me that UC Davis has
"found" the
cream gene, and they are working on a test for it!!! <snipped
here>
cs
Her article (Microsoft document) on it is stamped July 27, 2002.
Here's the first time I heard about the phenomenon in the Paso breeds; in this case, it was Peruvian Pasos where it was first noticed, and I found out about it through Deb Morgan.
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Deb Morgan
writes to Barb K on Thu, 05 Aug 2004: As far as Champagne, in the Peruvian Paso breed,... I have not, yet, found evidence that it exists (but am still looking). However, what does seem to exist is the non-cream factor which makes palominos appear to be cremello, chestnuts appear to be "palomino", etc... being mistaken as champagne... but do not fall under all the criteria for being a champagne (i.e. neither parent being champagne, etc.). A couple of Peruvian Paso "Cremellos" were proven to be, genetically, palomino (only one Ccr gene) via testing at UC Davis... though they had cremello coloring, pink skin, amber or hazel eyes (blue at first), even some mottling, etc. Will be contacting some others who have "cremellos", etc., though parentage shows they cannot be cremello (such as progeny from chestnut x buckskin, bay x palomino, etc. who produced so called cremellos/perlinos). Some of these are darker than cremello... more akin to a "dark" perlino with metallic sheen. Will also seek out "palominos" who should not be, genetically, palomino. The above is an email written by Deb Morgan.
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