Featured Post

Dr. Jamie Courter is your Mizzou Beef Genetics Extension Specialist

Image
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...
3 comments

ARSBC 2018: Practical Application of Genomic Tests in Beef Production

Megan Rolf
Kansas State University

What is genomic testing?
We are looking at single base changes (SNPs) at thousands of locations across an animals DNA. We can use these DNA markers to predict genetic merit differences. We can also use these DNA markers for parentage.

Other DNA test don't use markers, but they directly test the variant responsible for the phenotype. Examples of this are genetic defects or coat color testing.

Genotyping in seedstock
We collect a DNA sample, send it off to the breed assocation, and the data is incorporated into EPDs. DNA testing for genomic-enhanced EPDs is a breed improvement strategy. It is a way to make genetic progress faster. For a seedstock producer, it also provides customer service by providing more accurate EPDs.

We can used DNA to improve EPDs using two approaches. First, we can use a DNA to create a prediction of the trait and blend this prediction with the EPD. Or, we can use the DNA to better estimate the relatedness between the animals in our pedigree.

Even a low accuracy EPD is our best tool to make selection decisions. DNA tests don't predict all of the genetic variation in the trait. When we combine the performance and pedigree information with a DNA test, we get our best source of information. As we get more data on a bull he can become a high accuracy sire and very proven.

Parentage testing can help us figure out if a calf is sired by the AI bull or the clean up bull.
Parentage testing can help identify which bulls are frequent breeders and producing lots of calves, and which bulls are breeding very few cows. We are spending money maintaining a bull when he is not working very hard breeding cows.

Parentage testing uses patterns of inheritance. The genotype of the calf has to be possible based on genotype of sire and dam.

Link to video of Rolf's presentation: https://www.facebook.com/AngusJournal/videos/1070121819820475/

See ARSBC Newsroom for more information. http://www.appliedreprostrategies.com/2018/newsroom.html

Note: this post was live blogged and may contain errors.
Location: Ruidoso, NM, USA

Comments

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"
June 2, 2021 at 11:35 PM
Post a Comment

Popular posts from this blog

New Show-Me-Select Sire EPD Requirements Announced

Image
At the January 4th Show-Me-Select Board of Directors meeting, new service sire EPD requirements were approved. All sires, artificial insemination and natural service, must meet minimum Calving Ease Direct (CED) EPD requirements. In addition to yearly updates, two changes were made. First, no Birth Weight EPD requirement will be published. All commonly used breeds now have CED EPDs available. Second, all breeds in the International Genetic Solutions (IGS) genetic evaluation are now set to a common requirement. In the summer of 2018, breeds within the International Genetic Solutions switched to a single-step BOLT multi-breed genetic evaluation. The EPDs for animals in the IGS genetic evaluation are directly comparable across breeds. In 2017, the Red Angus requirement for CED was a CED of 8, which represents the 30th percentile. Less than 5% percent of heifers breed to a bull with a CED EPD of 8 or larger had calving difficulty. We feel that this require is meeting the need to re...
Read more

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

Image
All bulls purchased after February 1st, 2019 for use as natural service sires in the Show-Me-Select Replacement Heifer Program ™  must be DNA tested to have genomic-enhanced EPDs. All bulls used as natural service sires after February 1st, 2020 must have genomic-enhanced EPDs, regardless of when they were purchased. Seedstock producers classifying bulls as Show-Me-Select qualified in sale books must have genomic-enhanced EPDs on those lots. Bulls purchased prior to February 1st, 2019 will be grandfathered into the program, as is the common practice with all natural service sires. However, this grandfather grace period will end February 1st, 2020. At that time for a bull to qualify for use in the program, it must have genomic-enhanced EPDs. Why the change? The Show-Me-Select Replacement Heifer Program has the goal of producing premium heifers that perform predictably as 2 year olds. The program has a history of requiring Show-Me-Select producers to go beyond typical...
Read more

Bob Hough Comments on Changes at Breed Associations

Bob Hough recently posted the following comment on Facebook (posted with his permission): Early in my career at a breed association, the much beloved American Angus breed executive told me that the secret to success running a breed association was to have a top junior program, keep the books straight, and make sure the numbers (EPDs) don't change. This philosophy meant Angus valued stability in their genetic predictions over keeping them up-to-date with the latest science. The Angus Association also marketed extremely effectively the infallibility of their EPDs because of the size of their database. I will start with the later. Yes, a database needs certain critical mass to make sure the animals are tied, but that can be achieved in a modest size database. After that, data quality far and away outweighs data quantity in assuring the most precise and reliable EPDs possible. On the former point, Angus breeders are simply not use to change. This is not the case in most breed associ...
Read more