Down to the Genes Series
Everything the AJSA Needs to Know About DNA Testing
Genomics

Genomic testing is a cost-effective and quick way to add information to what is known about an animal’s genetic potential. One way to think of the information gained is by asking how much progeny would this animal need to see a similar increase in the accuracy of the EPD for that trait? These are referred to as progeny equivalents. Below is a table of progeny equivalents as of spring 2020. The way to interpret progeny equivalents is adding a genomics test is like adding over 25 calving ease records, 22 birth weights on progeny, etc. In other words, while a bull calf is still nursing, breeders can know an equivalent of 15 stayability records on his daughters - something that would take years to generate through progeny testing.
TRAIT |
PROGENY |
TRAIT |
PROGENY |
|
Calving ease | 25+ | Stayability | 15 | |
Maternal calving ease | 4 | Carcass weight | 6 | |
Birth weight | 22 | Marbling | 10 | |
Weaning weight | 25+ | Ribeye area | 8 | |
Yearling weight | 25+ | Back fat | 11 | |
Docility | 25+ |
An important fact: while genomic tests add accuracy to low accuracy animals, they can never replace reporting phenotypic data. For genomics to continue to have value, it is vital that breeders continue to submit quality phenotypic data.
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For additional resources for DNA requirements, estimated timelines, tips for DNA collection, etc., read the
Down to the Genes articles found below.