Test your knowledge: Genomics

Genomics are an essential part of genetic evaluations.

True

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False

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How is genomic information used in genetic evaluation?

Performance can be predicted for all traits based on genetic markers identified in each DNA sample.

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Genomic information is used to accurately identify relationships between animals that have a genotype.

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Reference populations are groups of animals that have been both genotyped and phenotyped for a specific trait. They are used as an information bank, relating a genotype (or specific SNPs) to phenotypic performance. Many factors influence the increase in breeding value accuracy when a genotype is added to an animal. They are:

The size of the reference population (how many animals are in the population)

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The relatedness of the genotyped animal to the reference population

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How much information is already being used to calculate a breeding value for that specific trait (e.g. own phenotype, progeny phenotypes etc.

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All of the above.

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Generally, the benefit of genomics will be seen most in which traits:

Birth weight, 200 day weight and fleece weight

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IMF/marbling, shear force and reproduction traits

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Understanding your genetic evaluation

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