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Offline DL

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Potential genetic defect in Shorthorn cattle
« on: December 21, 2011, 05:33:39 PM »
A number of cases (>5 and <10) of abnormalities of the distal leg/foot and dew claws in Shorthorn calves have been reported. These cases are not "classic" mule foot as the claws (toes) are not fused, typically the calf has inappropriately placed dew claws and may have some other slight curvature or deformity at the base of the leg that makes it somewhat difficult for them to mobilize. It is my understanding that the ASA is aware of these cases.

All cases have similar ancestors on one side of the pedigree. The DNA from these cases has been 50K genotyped and there is information to suspect that this abnormality has a genetic component. However there have been insufficient samples submitted to clearly determine if the abnormality is genetic or if there is another cause.

If you have a calf born with an abnormality of the distal leg/foot/dew claw contact the ASA and submit samples to Dr Beever. The attached pictures of newborn calves show what this abnormality may look like
« Last Edit: December 21, 2011, 06:00:45 PM by DL »
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Offline DL

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Re: Potential genetic defect in Shorthorn cattle
« Reply #1 on: December 21, 2011, 05:38:56 PM »
Additional pictures of potential genetic defects in Shorthorn cattle, again note this is a calf
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Offline aj

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Re: Potential genetic defect in Shorthorn cattle
« Reply #2 on: December 21, 2011, 06:43:28 PM »
Very interesting.
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Offline aj

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Re: Potential genetic defect in Shorthorn cattle
« Reply #3 on: December 21, 2011, 07:12:19 PM »
Can the calves walk with the defect or are they put down?
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Offline sue

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Re: Potential genetic defect in Shorthorn cattle
« Reply #4 on: December 21, 2011, 07:18:46 PM »
Can the calves walk with the defect or are they put down?
I was going to ask the same thing?
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Offline aj

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Re: Potential genetic defect in Shorthorn cattle
« Reply #5 on: December 21, 2011, 07:23:07 PM »
I may have one. Its only on one ankle though.
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Offline worthabit

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Re: Potential genetic defect in Shorthorn cattle
« Reply #6 on: December 21, 2011, 08:19:48 PM »
Have these suspect cases all occured in 2011 or over several years?

Offline DL

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Re: Potential genetic defect in Shorthorn cattle
« Reply #7 on: December 21, 2011, 09:43:30 PM »
Mostly born alive, severe calves put down, less severe can grow into it and eventually be marketed via sale barn, etc....

Cases over the last little bit (couple of years) and from various geographic regions

Seems to be bilateral but severity can be variable, so one leg could be obviously affected and the other more subtle  - affects joints below the hock

Hind limbs only affected

aj - send samples and pictures to Dr B

It is important to remember that to determine if this is genetic or something else you must provide samples - the gene gurus cannot do this work without breeder cooperation


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Offline E3 Durhams

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Re: Potential genetic defect in Shorthorn cattle
« Reply #8 on: December 21, 2011, 11:18:25 PM »
DL, thank you mam for speaking up. I sure have learned alot. Send in your sample folks!
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Offline -XBAR-

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Re: Potential genetic defect in Shorthorn cattle
« Reply #9 on: December 22, 2011, 12:06:24 AM »
Do forward slopping or flexed pasterns fall into this category?
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Offline cownerd

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Re: Potential genetic defect in Shorthorn cattle
« Reply #10 on: December 22, 2011, 03:40:50 PM »
Are the calves that have had the defect all from different sires?

Offline aj

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Re: Potential genetic defect in Shorthorn cattle
« Reply #11 on: December 22, 2011, 04:22:59 PM »
I think someone said that the calves 5-10 of them were sired by brothers or related if I remember right. The calf I had had a bad right foot and he walks ok. He's 10 months old. I don't even know if the cow has to be a carrier or not. My calf had a bad back leg defect. I just assumed that the cow was the problem as she had club calf blood in her background.
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Offline DL

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Re: Potential genetic defect in Shorthorn cattle
« Reply #12 on: December 22, 2011, 07:27:59 PM »
Are the calves that have had the defect all from different sires?

to date calves have been sired by one bull or sons of that bull
« Last Edit: December 22, 2011, 08:39:27 PM by DL »
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Offline cattlefarmer

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Re: Potential genetic defect in Shorthorn cattle
« Reply #13 on: December 22, 2011, 08:30:29 PM »
DL have you sent these photos to the ASA? I bet they would like to see them.  I would think that would be the first the first place to go not steerplanet!
« Last Edit: December 22, 2011, 08:46:29 PM by cattlefarmer »

Offline jaimiediamond

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Re: Potential genetic defect in Shorthorn cattle
« Reply #14 on: December 22, 2011, 08:34:18 PM »
Was the dam's of these calves also related to this bull or was it a complete outcross?

 

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