Genetics Color Question

ClantyreSheltie said:
I know which dog she is talking about, he is a white factored, bi factored double merle. No question. This is one of those cases where there isn't enough merle gene passed to express merling.

There is another dog I ran across recently who is a solid out of a double merle, I can't remember where I saw it... Still looking....

Aha!

http://www.echowyn.com/Ashley.html

Cameo White Minx is listed as a double dilute.
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that's a beautiful sheltie- lots of good stuff on that site- thanks for the link :yes:
 
Wow..some fantastic reading on these sites!! thank you both for posting,and for this thread.

Although not versed by any means,I am trying to find out what I can on double dilutes.

Again thank you~And Mia..thanks you to:wink2:
 
corbinam said:
Hate to hijack this thread...but I'm assuming a double dilute is different from a double merle. Is that right?

I often think of this dog when I think of double merles, but he's listed as a double dilute, too.

http://www.shadowhillshelties.com/shelties/boys/oreo.html
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No they are the same thing, just slightly different names. Polaris was who I thought of when Shelli mentioned the breeding that was done...While I havent seen him in person, it appears in his coat to have somewhat of a coloring/pigment though in the pics
 
Lightplum said:
No they are the same thing, just slightly different names. Polaris was who I thought of when Shelli mentioned the breeding that was done...While I havent seen him in person, it appears in his coat to have somewhat of a coloring/pigment though in the pics
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He is the dog with the solid black son. The dog has to be a cryptic. I am interested in the supposed merle test that say he wasn't unless there was a mutation. Its what I don't believe.

Thank you Rachel for the explaination. Best I've heard so far. So a blue with less black(total body) and smaller patches, would that dog have more amino acids and less of a chance of a cryptic being produce?

Also can some explain Domino pattern? I have read(cherden shelties website)that a domino can only produce itself, harlequin and cryptic. The domino pattern is becoming more common in the breed and thus why we are seeing more cryptics. But what exactly does it look like. Banchory Strike Me Silver is used as an example but how is that different from other patterns. I don't understand.
 
I am not sure how exactly the patterns fall into the genetics. I suspect there are modifying genes that act in conjunction with the merling to produce the different patterns. Those tend to be familial, some stronger than others. My dog is a Ch Cub Hill Steel Wheels grandson. If you look at that family, there is a strong resemblance with regard to the merling, especially in the Cruise kids.
 
ClantyreSheltie said:
No, she is solid. She was twice bred to merle dogs and produced regular merles.
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No, she's really not. She's really a merle if she has a double merle as a parent.

If a dog has a double merle as a sire/dam, then that dog is a merle. Merling does not and cannot skip a generation. It is there or it is not. Since a double merle has 2 copies of the merling gene, it will be passed on 100% of the time.

Whether she looks solid or not, she has the merling gene.

Just because she has never had a double merle when bred to a merle does not make her a "non merle". Although a merle is supposed to pass on the gene 50% of the time, that doesn't mean that it will actually be passed on exactly 50% of the time.

There are palomino horses who have produced nothing but dilutes (palomino, buckskin & smoky black), in which the gene works like the merling gene. A single dilute has 1 copy of the gene, and should pass on the gene 50% of the time.
 
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