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Post by goldshaftdexters on Aug 13, 2012 18:04:25 GMT -5
[/img]I have had white "introduced" into my herd when I have used Outlaw bloodlines and also South African lines. Outlaw's tended to be excess white on the shelton's triangle but the SA lines can be anywhere! (I will try and post some photos...) Andrea This heifer's dam is an Outlaw great grand daughter and her sire is an South African import (embryo). I will put more photos up (can't seem to find how to add more than one photo to this posting?) Attachments:
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Post by goldshaftdexters on Aug 13, 2012 18:13:46 GMT -5
Same - Outlaw great grand daughter & SA embryo. Attachments:
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Post by jamboru on Aug 13, 2012 18:33:26 GMT -5
We use CO to get rid of white udders, never fails. We also have used him over grand-daughters, no white, great feet, etc. Also no brindle. Fran
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Post by laughingllama75 on Aug 13, 2012 21:15:21 GMT -5
However, Barb, as you can (I hope) see, the photo is actually a shorthorn (look at the horns) with a chondro carrier ancestor. Just another example of what I'd been saying for years: in the beginning, to be a Dexter you only had to be short between the knee and fetlock. From what I remember of the Cornahir herd 20 odd years ago back before David made a major herd reduction, they didn't have any white, even in the udders. Why do you say Shorthorn? I used to have a pair of shorthorn steers, and that guy does not look shorthorn to me. Wrong body type and hair. Sure, color but that is the only similarity. Hmmmmmm
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Post by kansasdexters on Mar 18, 2014 20:29:10 GMT -5
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jamshundred
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Help build the Legacy Dexter Cattle "Forever" Genotype database
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Post by jamshundred on Mar 18, 2014 20:55:04 GMT -5
Ref: The "Dexter" bull owned by the King of England. I have been searching through the herdbooks to find this animal and no where can I find his identity. I believe he was a crossed animal . I cannot find any record of a bull owned by the King which describes the animal as "black with white".
Ref: Marion's comments about Pardon Bullfinch. This is unsubstantiated by breeding in the US. I have personally spoken to every living breeder who used Pardon Bullfinch semen or had offspring breeding in their herds. NOT a one ever had white markings on their calves. I have NO doubt PB carried recessive white like almost all Dexters do. It has been there from the earliest records. BUT. . . . excessive white spotting like one sees in Holstein or Jersey cattle has NOT been in the US herd that I can discover until the importation of Lucifer and Saltaire Platinum, and like mentioned above Outlaw, though he is almost always in a pedigree with the L and S so you cannot be sure of the origin of the color. This we know: Lucifer had Jersey and according to Mrs. Rutherford probably some shorthorn. Platinum had unknown crossbred cows in several places. Could have been anything.
Judy
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Post by kansasdexters on Mar 19, 2014 18:38:48 GMT -5
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Post by kansasdexters on Mar 20, 2014 7:30:03 GMT -5
Here's a link to the treatise on Longhorn Cattle colors: doublehelixranch.com/color.htmlThe Brindle color pattern, needs the presence of the wild-type allele (E+), in order to be expressed. Interestingly, E+ is expressed as red coat color in Dexter cattle, when it occurs as E+/E+, or E+/e. The Icelandic cattle are also very colorful, because they have not been selected (as a breed) to be any specific color. Icelandic cows express many different coat colors and color combinations: www.icelandichorse.is/cows.htmlIcelandic cattle were brought to Iceland by the Vikings over a 1,000 years ago. The Vikings raided villages (and had settlements) along the coast of Ireland and Scotland. It's not a very far stretch from Ireland to Iceland on a Viking ship, if you're a colorful cow. Patti
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Post by carragheendexters on Mar 20, 2014 20:01:53 GMT -5
Here in Australia these excessively white-marked calves would not be registerable. Any patches of white or markings on the underline forward of the navel in a bull makes it unregisterable, in a cow any patches of white anywhere except on the underline or udder makes her unregisterable. We have guidelines also as to how much white is also undesirable, eg forward of the navel in cows, or white on the underline behind the navel in bulls. I love that Icelandic link Patti, did you scroll down and read the last part with the list "You know you live on a dairyfarm", spo apt and probably what most of us can relate to. The Icelandic cattle are nice looking and some lovely colours, and seem to be good producers in a harsh environment.
regards Louise
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Post by stephanie on Mar 23, 2014 5:39:39 GMT -5
Way back when I kept a dairy herd it was not as unusual as you would expect for the AI to get straws mixed up. This is quite worrying as of course we would only notice when a cow that was "expecting" a Friesian or Holstein calf produced a Belgian Blue or Hereford Cross! We wouldn't know if the sometimes very expensive semen we had paid for had been mistakenly - I hope - swapped for something inferior but of the same breed!!!
Stephanie
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Post by cddexter on Mar 23, 2014 7:19:36 GMT -5
Which is why I always kept the empty straws (and before that the pipettes) and checked the ID on them. I had my own tank, which helped. At least if the wrong bull was used, I could abort the calf right away and catch the cow on the next cycle. cheers, c.
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Post by stephanie on Mar 23, 2014 12:37:43 GMT -5
What a good idea cddexter. After it happened here I used to check the identity of the straw along with the AI technician before they inseminated each cow if I could, especially when it was special expensive semen.
Stephanie
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Post by Deleted on May 9, 2014 22:48:46 GMT -5
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Post by kansasdexters on May 10, 2014 1:08:11 GMT -5
Hi Cathy, The tests that UC-Davis did to determine your Dexter's color genotype were as follows: Test done on the Extension Locus (MC1R) on Chromosome 18 to determine Red or Black -- you got ED/ED, which means homozygous for Dominant Black "ED" at the Extension Locus (MC1R), therefore the cow doesn't carry a red gene at the Extension Locus (MC1R). Test done for "Dexter Dun" on Chromosome 8 to determine Dun -- you got B/B, which means homozygous for Black "B", therefore the cow doesn't carry the Dun "b" gene. Please refer to the following link to read about pale coat colors in cattle: homepage.usask.ca/~schmutz/PaleColors.html#WhiteThis reference explains that the gene or genes causing white have not all been discovered yet. White, as seen in Charolais cattle, is actually caused by an epistatic or masking gene. White Charolais are actually red "e/e" at the Extension Locus (MC1R) on Chromosome 18, but they do not express a red coat color when they are homozygous for a specific mutation in the PMEL gene on Chromosome 5, which is common in the Charolais breed. When that specific mutation in the PMEL gene on Chromosome 5, occurs in homozygous form, the animal is white. When it is heterozygous, as in a Black Aberdeen Angus X Charolais cross-bred calf, the color is closer to grey or "smoke". Patti
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Post by carragheendexters on May 10, 2014 7:42:34 GMT -5
What a pretty coloured calf Cathy. It looks almost like the colour of some Murray Grey calves. I have seen those Charolais cross with Angus, (my neighbour did it for a while) and they are the prettiest silver. It is a cross that is sometimes done here in Australia Angus bull over Charolais cow to help with calving.
It looked more of a silver grey than what your calf is, your guy from the photo looks more of a brown grey. Very pretty none the less.
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