What is the genetic condition abbreviated CA?

Contractural Arachnodactyly (CA) is a simple recessive trait in beef cattle. CA is better known as “fawn calf” as affected calves have hunched hind quarters similar to young deer. This condition affects Angus and Angus-derived cattle. CA is not a lethal mutation but it does affect the productivity of animals born with this condition. Affected…

What is the ASA policy for DD?

Due to the number of unknowns associated with DD and its inheritance and the increasing number of genetic conditions, the Board decided to continue monitoring DD closely but at this time will not add DD to TraitTrac. In lieu of adding DD to TraitTrac, we will report DD test results in Simmental-influenced animals on our…

Changes to TraitTrac

At the April board meeting, the ASA Board of Trustees voted unanimously to remove the color system from TraitTrac and add all genetic conditions with available tests into our TraitTrac system (including the most recent condition, developmental duplication, [DD]). While the existing TraitTrac has worked well for years, it gives a false impression that “green”…

Using a defect carrier in your herd

Knowing how defective genes propagate into the next generation helps us make management decisions that allow for the use of carrier animals. Of course, no one system fits all operations or all defects. Points to think about when deciding how to manage against defects include the economic impact of the condition, the frequency of the…

Reporting unusual calves to the ASA

During the calving season, it is not uncommon to hear about unusual calves born with a variety of defects. Many of these defects are spontaneous events that are triggered by a variety of cues and are not necessarily genetic in nature. However, reporting these abnormalities to the ASA or other breed associations is vital to…

How can I get my animal tested for DD or other genetic conditions?

Agrigenomics, GeneSeek, and Zoetis all offer the developmental duplication (DD) test. To order the DD test through ASA, you can do one of the following: contact us by phone at 406-587-4531, email dna@simmgene.com or you can download a DNA kit request form at http://www.simmental.org/site/userimages/forms/DNA%20card%20request%20form_Genetic_Forms.pdf and submit via fax/email/mail to ASA. To send out a DNA…

What is Developmental Duplication (DD)?

Recently the American Angus Association announced the discovery of another genetic condition called developmental duplication (DD). Most affected calves that survive to term are born with multiple limbs or polymelia. Polymelia occurs spontaneously in cattle of a variety of breeds as well as other species including sheep, horses, and humans. Other than an increased occurrence…