Carrier bulls used on commercial cattle

[KSUwildcat2009]

Idaho, have you continued this discussion with your class?  What do your students think?

 

[cornish]

Improver was imported from Ireland. I know on the dwarfism deal in the Herfords was traced to St. Louis Lad born in 1890 something. The problem exploded in the 1950's when 2 popular lines started hooking up. Gardiners Angus bull is interesting cause as I understand it HE was the original mutation.

are they sure 'he' is the originator?  I've always been under the impression that curly calf has been evident in the Jersey breed for decades-- and it's a known fact that Jersey blood has been injected into Angus genetics for their calving ease, milking ability, and marbling. 

As well as TH being in the Galloway breed-- hmm.. maybe that's why it's linked to HAIR and BONE???

Maybe HAB could have some input...

 

[HAB]

Improver was imported from Ireland. I know on the dwarfism deal in the Herfords was traced to St. Louis Lad born in 1890 something. The problem exploded in the 1950's when 2 popular lines started hooking up. Gardiners Angus bull is interesting cause as I understand it HE was the original mutation.

are they sure 'he' is the originator?  I've always been under the impression that curly calf has been evident in the Jersey breed for decades-- and it's a known fact that Jersey blood has been injected into Angus genetics for their calving ease, milking ability, and marbling.  

As well as TH being in the Galloway breed-- hmm.. maybe that's why it's linked to HAIR and BONE???

Maybe HAB could have some input...

As for TH and Galloways, I only have stories and written history, which could be written stories.

The Galloways at one time, did have TH carriers.  The breeders (worlwide) did mid term abortions on suspect matings and culled all carrier bloodlines.  

This is how it is rumored to have gotten into the Irish shorthorns.

My understanding is that some carrier Galloway bulls were disposed of through stockyard sales.  One or multiple bulls were bought by "closed herd" Irish shorthorns...and the rest is...

With the small gene pool of Galloways world wide, if a carrier was still present, it should have surfaced by now.  The Galloways have a closed herdbook, so no outside blood has been introduced.

I have raised Galloways for 30 years, and have been active in the association the entire time.  No one has identified a TH affected calf. 

The question I get asked most, is "What's the deal with all the belts and the whites?" ???

 

[KSUwildcat2009]

feed grass, I think aj was talking about NH, not AM.  Amazingly, they were able to identify 1680 as the proband animal, which doesn't happen very often.  His parents are both NHF while he is NHC.  Interesting stuff if you ask me.  Crazy how one little thing causes a world of difference.  This is the reason I'm so into genetics.

 

[idahoag]

They feel that as long as calves will be terminal then there will be no problem or extremely unlikely.  With regards to replacement heifers, we are in agreement that they will be kept from cleanup bull breeding, non-AI'ed cows or more consideration has to be given to bulls that are non-carriers.  Some of the kids think that they would never use a carrier bull just in case....

Idaho, have you continued this discussion with your class?  What do your students think?