Simple question, what does it mean to be for a bull to be Homozygous Polled? The books tell us that a homo bull bred to horned cows will produce polled calves. Period. I checked progeny listed from a half dozen random bulls that were tested homo polled and every one showed horned offspring. What does this mean? a)the most basic principles of genetics and breeding are nothing more than textbook theories that don't apply to the real world. b)all these breeders don't know the difference between horns and scurs. c)parentage mistakes. In which case it should have thrown a red flag for the breeder and AHA to recheck. One calf was horned out of a homo bull and polled cow, a genetic impossibility as I understand it. d)DNA tests are innaccurate. If this is the case why should I pay for a homo test that means "maybe" this bull will dehorn? And if the homo test isnt always right then what about the defect tests that we are relying on to eliminate problems there. This is something that needs to be looked into.
With the recent discussions, I decided to follow up on this post and see if the AHA is still registering horned calves out of homozygous polled parents. Disappointingly, I found calves born in 2018 that are genetic impossibilities. Is the integrity of the breed a joke to Kansas City? What is most disappointing is that we have the ability to identify the confirm the parentage of those calves. DNA testing has been mandatory for sires born after 2011 and it would be a simple matter to use that information do identify and confirm the correct parents. Why haven't we done so?
This is a problem that needs to be flagged on entry (and may have been with the Myherd updates, I don't know). It's flagged going the other way. I talked to a neighbor breeder who had a polled calf from horned parents last year ( yes, you read that right) and the entry was flagged for double checking. I looked at a bull in the show at Denver in the horned class out of a Homo bull and he was definitely scurred. I talked to the breeder of that bull's sire and told her that bull and several others have horned progeny listed. She said she had talked to one of the horned breeders that is using him and he said he just goes down the list and clicks everything horned. Most of the offenses are coming from a couple bigger horned herds so that is very likely the case. That and people calling heavy scurs horns. Either way, I agree the AHA needs to start taking this seriously and check into some of these cattle.
This is a perfect example of why us old crabs have become so jaded about what is happening. I have no illusions that HOP cattle have a future in the north American cattle industry of today. But, doggone it, the breed needs to stop lying about what is happening!
Post by strojanherefords on Feb 7, 2019 23:13:27 GMT -6
I have a feeling that the AHA doesn't want to raise the issue of incorrect parentage of purchased cattle. At this point, it is a simple matter to take a DNA sample identify the correct parentage or horn status.