Featured Post

Dr. Jamie Courter is your Mizzou Beef Genetics Extension Specialist

By Jared E. Decker Many of you have probably noticed that things have been a lot less active on the A Steak in Genomics™   blog, but you probably haven't known why. In January 2021, I was named the Wurdack Chair in Animal Genomics at Mizzou, and I now focus on research, with a little bit of teaching. I no longer have an extension appointment. But, with exciting news, the blog is about to become a lot more active! Jamie Courter began as the new MU Extension state beef genetics specialist in the Division of Animal Sciences on September 1, 2023. I have known Jamie for several years, meeting her at BIF when she was a Masters student. I have been impressed by Jamie in my interactions with her since that time.  Dr. Courter and I have been working closely together the last 6 weeks, and I am excited to work together to serve the beef industry for years to come! Jamie holds a bachelor’s degree in animal science from North Carolina State University and earned a master's degree in animal

BIF 2018: Experiences with Implementation of Single-Step at American Angus, One Year In

Steve Miller

Angus Genetics Inc has four research scientists. They do single-step genomic evaluations for Angus, Canadian Angus, Charolais, Canadian Charolais, and Maine-Anjou.

Angus switched to single-step on July 7th, 2017. Miller feels like the switch to single-step was a monumental switch, should have made the Time Magazine year in review!

When breeders see bulls re-rank, they then understand was a correlation of 0.9 really means! On July 7th, Steve Miller talked to two breeders. On July 8th he was feel cool and casual like Ferris Buller. The next week, then the calls came.
"I've seen this before, in a couple of months it will all blow over" a friend told Miller. And that proved true.

The switch to single-step was kind of like the stages of grief with getting a flat tire.
Quiet phase: Listening, evaluating, asking yourself if you have a flat tire.
Expressive phase: Cussing, kicking dirt, frustrated.
Have to Move Forward phase: Fixing the tire and getting back on the road.

Communication was crucial, both before the changed occurred and phone calls after the change.

There is no way AGI would go back to the methods used before the switch to single-step. The new evaluation is that much better.

On July 7th, Angus changed to single-step. But they also made a lot of other changes to the evaluation. The changes were frequently due to the changes in the carcass model, by accounting for the selection bias in which animals had carcass and ultrasound data.

Single-step is now a brand.

Any genetic evaluaiton is only as good as the data behind it.

Genotyped database has doubled in 96 weeks. On June 16, 2018 they reached over 500,000 samples. They receive over 3,000 samples per week since November 2017.

So, after the storm of single-step passed, what questions now cause the phone to ring.
How can two flush mates have this different of EPDs?

The power in the pedigree. Creating the famous A matrix, the relationships between all of the animals in the evaluation. When we use pedigree data, we use the expected relationships between animals. But, with genomic data, we actually use the real relationships between the animals.

Recombination between paternal and maternal chromosomes cause unique chromosomes being inherited by the progeny of a bull.

We can look at 4 bulls.

Bull Rank Whole Chromosome 6 Top Half of Chromosome Bottom Half of Chromosome
Bull A 1 6 9
Bull B 51 7 167
Bull C 58 187 1
Bull D 183 171 184
Rank out of top 193 Sires for Birth Weight genomic value.

Look at variation in calf crop. One quarter of the variation comes from the dams. On quarter of the variation comes from the sires. One half of the variation comes from Mendelian sampling, the random shuffle of genes and chromosomes between generations.

As a breeder, we should love variation. Variation is what makes genetic progress possible.

Theory and what AGI is putting out the door matches. up.

Consider two full sib ET bulls. Pedigree says they should share 1/32 of their DNA with Shearbrooke Shoshone. But, what does the DNA say? Calf with higher birth weight EPD is 15% more related with ancestors is the pedigree with higher birth weight EPDs.


Judge Flora said…
Hey Guys!!! I got mine from loyalty. My blank atm card can withdraw $2,000 daily. I got it from Alexandra Roger last week Wednesday and now I have $10,000 for free. The card withdraws money from any atm machines, it is not traceable and now i have money enough for me and my 4 kids. I am really happy i met Alexandra Roger because i met two people before them and they took my money not knowing that they were scams. But am happy now. Alexandra Roger sent the card through DHL and i got it in three days. Get one from her now. She is giving it out to help people. The card works in all countries.Hurry and email via dwhackers01@gmail. com
Caillo Lisa said…
This is another testimony on how Chief Dr Lucky cured My HIV Disease. Do you need a cure for your HIV disease? Do you want to be cured from your cancer disease? Or you want to be free from any type of disease. Kindly visit his website https://chiefdrluckyherbaltherapy.wordpress.com/ , he just cured my HIV disease and I’m very grateful to him, he is the only herbalist that can cure you.  Whatsapp number : +2348132777335 
Via Email : chiefdrlucky@gmail.com
Thank you all for reading,
God bless"

Popular posts from this blog

Show-Me-Select Board Approves Genomic Testing Requirement for Natural Service Sires

New Show-Me-Select Sire EPD Requirements Announced