Congenital Disease

Take Time, Do It Right - Collecting Samples for DNA Testing

You’ve already heard plenty about DNA t esting. You know DNA tests can be applied commercially to determine parentage and to manage genetic defects in cattle. You know that analysis of an animal’s DNA can determine the presence of gene markers associated with specific performance or carcass traits. You also know DNA genotyping has advanced to where testing can reveal an animal’s DNA profile — a summary of genetic influences on a variety of economically important traits.

Genetic Defect FAQs - RAAA

This PDF contains questions and answers regarding the RAAA's policies in dealing with genetic defects.


Avoid Cattle Defects With Mating Decisions

With expected progeny differences and genomic testing, beef cattle breeders can predict calf structure and performance traits.

Researching pedigrees and sire summaries creates a forecast of the future, but one of the most important genetic predictions is often overlooked.

Many beef cattle genetic deformities are now tested for in pedigrees and should be evaluated when making mating decisions. Being aware of potential defects and then breeding based on probabilities can keep herd size growing and herd quality admirable.

Heritable Birth Defects In Cattle

Inherited congenital anomalies are probably present in all breeds of cattle and propagated as a result of specific trait selection. In some breeds, the occurrence of inherited anomalies has become frequent, and economically important. Veterinarians, animal scientists, and cattle breeders should be aware of inherited defects, and be prepared to investigate and report animalsexhibiting abnormal phenotypes. This review will describe the morphologic characteristics,

Developmental Anomalies in Farm Animals (II. Defining Etiology)

Anomalous development is a function of the genetic make-up of the fetus and the environment in which it develops. The cause of anomalous development may occasionally be obvious but more often is obscure, because of its multifactorial nature. Therefore a methodological approach is often required to define the etiology. In this paper we describe a methodological approach that first defines the incident, the genotype of the individuals involved, and the environment in which the fetus has developed.


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