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Agricultural News


Historical Path to Breeding Up to a Purebred Simmental Cow Herd

Mon, 10 May 2021 09:17:07 CDT

Historical Path to Breeding Up to a Purebred Simmental Cow Herd Emme Demmendaal writes in an article for simmental.org on the historical path of breeding up..

ASA members have evolved and adapted to meet customer and consumer needs over time. From the IGS Genetic Evaluation to the ASAís DNA research projects, our board and membership have striven to improve cattle, making this breed a forerunner in beef cattle genetics. Part of the evolution has been the adaptation of the breed classification chart through time.

When the Association started, the initial Simmental breed-up process was designed with four categories to be as simple as possible, and the breed percentage chart reflected the end goal of making a purebred Simmental.

Later on, breeders ó driven by commercial demand ó started producing half- and three-quarters-blood Simmental by introducing a bull of another breed. Most commonly seen was a Simmental cow bred to an Angus bull. Producers were breeding purebred Simmental cows to other breed bulls to produce half blood Simmentals; half bloods to 3/4 to get 5/8 Simmental; and 5/8 to a non-Simmental to produce 3/8 Simmental.

While the initial breeding chart was created to upgrade from one breed to purebred Simmental, the new breeding and marketing methods didnít fit the original breed classifications. The evolution of breeding practices encouraged the expansion of the chart to include increments to match the expanding breeding methods.

In addition to the Simmental breed classification chart, the Simbrah breed had its own chart to classify Simmental percentage. The Simbrah breed-up program was completely separate from Simmental. As time went on, the two breed charts and their classifications left breeders with a mating that, if you consider the animal Simbrah, the percent Simmental was classified differently than if it was a regular Simmental cross with a different breed.

To remove confusion and eliminate discrepancies in classifications while simplifying the process for all SimGenetic producers, one percentage chart classification was chosen for Simmental, Simbrah, and SimGenetic animals. At this time, the board decided to classify both female and male purebred animals as Simmental or higher (remember that up until that time, a 7/8 bull was classified as 7/8 and a 7/8 female was classified as purebred Simmental).

Incidentally, by rounding by eighths, producers ran into situations where the animalís breed percentage was not an even eighth fraction. To address this percentage issue, the board strategically decided to round up or down the Simmental percentage for each scenario. In most situations, the Simmental percentage rounded up to the nearest eighth, but to fit the Simbrah classification and use one chart, the board elected to round down on 3/4 Simmental crossed with a 5/8 Simmental.

As seen through time, the evolution of the breed classification has been a strategic move to simplify marketing for SimGenetic cattle. Through the changes in breed classifications over time, the genetic evaluation has continued to calculate breed percentage down to the thirty-second, based on all known ancestors to account for hybrid vigor.

A half-blood Simmental was produced by breeding a purebred Simmental bull to a non-Simmental cow. From there, the half-blood females are bred to another purebred Simmental bull to get a 3/4 blood Simmental. The 3/4 blood females bred to a purebred bull to get a 7/8 Simmental. At the 7/8 level, the females were considered purebred, but to get a purebred Simmental bull, breeders had to go one more generation. The 7/8 Simmental (purebred) females were bred to a purebred Simmental bull, and at this point, both the males and the females from that mating were classified as purebreds.

With the current breed percentage chart, SimGenetic producers have the best marketing tool available for classification, backed by a genetic evaluation system that looks behind the classification to evaluate cattle. Itís through the ingenuity of the board, members, and staff that a complicated issue of breed classification has been refined to simplify the selection of animals based on economic traits and other qualities to create easily marketable SimGenetics.


   


 

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