Posts

Featured Post

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 cattle production pr…
Read more

Open House at Southwest Center Shares Beef Cattle Research and Technology

Image
University of Missouri's Southwest Research Center near Mt. Vernon hosted an open house December 3rd that gave attendees a peek at the direction beef cattle research is taking at the 890 acre Center.

Dr. Jordan Thomas, MU Extension beef reproduction specialist, led the presentations by asking if producers think they can afford not to use technology. Specifically, he mentioned estrus synchronization and artificial insemination.

"The genetics of the AI bred calves allows producers to be competitive with the best herds in the country due to the use of elite bulls with higher accuracy expected progeny differences (EPD)," said Thomas. "The protocol results in more early-born heifers that are more likely to conceive earlier and remain in the herd longer."

That longevity adds to herd profitability over the females lifetime. Their early-born steer mates will also be heavier than those out of a natural service sire that's born late in the calving season.

Dr. Jared D…
Location: Southwest Research Center, 14548 State Rd H, Mt Vernon, MO 65712, USA
Read more

BIF Genetic Prediction: Decision Support Using Customizable Indices Across Breeds

Matt Spangler
University of Nebraska-Lincoln

Are we done with changes? Releasing a single-step evaluation should allow us to focus attention on other topics and needs.

EPD have been available to the U.S. beef industry for over 40 years. Survey results suggest that 30% of beef producers use EPDs or indexes as their primary selection criteria. Part of the lack of technology adoption is likely due to the confusion surrounding how best to use them. Also, some breed associations publish in excess of 20 EPD per animal. There are increasing number of EPDs, but we continue to publish indicator traits such as Birth Weight, when we have the economically relevant trait published, Calving Ease in this case.

Selection indexes were first published in 1942, but the first breed-wide selection index for beef cattle was published in 2004.

We have terminal and general purpose indexes in the beef industry. "We don't have any truely maternal indexes in the beef industry," Spangler said. We do…
Location: Kansas City, MO, USA
Read more

BIF Genetic Prediction: Would You Drive a Race Car WIthout Steering?

Lee Leachman
Leachman Cattle of Colorado

Leachman's uses three indexes, $Ranch which is birth through weaning, $Feeder which is weaning to carcass, and $Profit which is $Ranch and $Feeder combined.

"Most of us as breeders cannot look at 22 traits and compute a quadratic equation to identify the best combination of traits." Leachman said.

On the female side they are adding $2 per cow per year using the $Ranch index. They have data from a cooperator showing an increase in pounds weaned per cow exposed.

"We know we can make rapid change. We know it can be significant," Leachman said.

With Lu Ranch, they added an inch to ribeye, doubled the number of cattle qualifying for CAB, and improved other traits included in the indexes.

Leachman worked with his cooperators and after three years of discussion, they were able to share the indexes with other seedstock producers. Over 50 breeders are included in the evaluation. Over 38,000 records are added each year.

Would you d…
Location: Kansas City, MO, USA
Read more

BIF Genetic Prediction: Genetic Evaluation at the American Hereford Association

Shane Bedwell
American Hereford Association

Today is the 1 year plus 2 day anniversary of AHA's switch to single-step.This is the North American Hereford Genetic Evaluation including AHA and Canadian Hereford Association. They are currently working with Uruguay and Argentina are in the process of switching to the single-step approach.

Part of the process was building a fully automated genomic pipeline to run the genetic evaluation weekly. They have been very happy with the quality controls measures that were built into this pipeline.

AHA implemented a data pruning strategy to capitalize on their switch to whole-herd reporting in 2001. Animals that have data reported after 2001 plus 3 generations of their pedigree are included in the analysis.

They have performance data on 2.3 million animals. They have genotypes on over 70,000 animals.

Previously, all traits were fit in a single model. With the switch to single-step, AHA switched to 9 cluster models. They also re-parameterized the …
Location: Kansas City, MO, USA
Read more

BIF Genetic Prediction: Genetic Evaluations at International Genetic Solutions

Mahdi Saatchi
International Genetic Solutions

IGS has data from about 15 different breed associations. They have 180,000 genotyped animals in the evaluation. Two years ago, they have 65,000 animals genotyped in IGS. Most of these were males. So, in the last two years they have almost tripled this number and have added many more females, through programs such as Cow Herd Roundup.

IGS uses the BOLT software developed by Theta Solutions. This software allows many different types of models to be fit. IGS fits the single-step hybrid model. In single-step BLUP, you blend the pedigree relationships with the genomic relationship to have a single relationship matrix. In single-step hybrid you blend the genotypes and pedigree to infer genotypes for every animal in the pedigree. They then use the marker effects to estimate breeding values.

In their genetic evalution they use a subset of markers that they have identified as predictive in multiple breeds. This subset of markers provides more accura…
Location: Kansas City, MO, USA
Read more

BIF Genetic Prediction: Genetic Evaluation at Neogen

John Genho
Neogen/GeneSeek

Genho works with American breeds and smaller breed associations to provide them with genetic evaluations. He implemented single-step BLUP to use genomic information.

Brangus and Santa Gertrudis have monthly genetic evaluations. Brangus has over 21,000 animals genotyped. Other clients range from 3,000 to 6,000 animals genotyped.

A lot of the problems with genomic prediction is having lots of animals in the pedigree, but with relatively small proportion of animals genotyped. However, Genho works with commercial ranches who have genotyped every living animal. This simplifies many of the struggles with single-step BLUP. Genho wonders what the next iteration of models will look like given the entire dataset is genotyped.

All of the American breeds have Bos indicus influence. However, there are very few pedigree connection between these breeds. Genho wonders if identifying marker effects that could be shared across breeds could be an opportunity to share data acros…
Location: Kansas City, MO, USA
Read more

BIF Genetic Prediction: Genetic Evaluation at Angus Genetics, Inc.

Steve Miller
Angus Genetics Inc.

Details of genetic evaluation are published in their Sire Evaluation Report. angus.org/nce The first four papers of the report contains the details of the evaluation. Miller states that it actually functions as a nice animal breeding textbook.

Angus Genetics, Inc. does evaluations for 6 clients, ranging from weekly to annual evaluations. The weekly evaluation of Angus is a bit like Groundhog Day, same thing week after week.

The Angus Association uses an unweighted single-step approach, and the development of this method is the result of lots of research that has been peer-reviewed and
published.

When they switched to single-step they asked the question if the new evaluation was actually better. They compared to the independent evaluation done by USDA-MARC. The new evaluation performed better.

Because the single-step model allowed them to fit more traits in the same model, they improved the carcass trait model. By adding in weaning weight, they were able…
Location: Kansas City, MO, USA
Read more