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Printable Handouts
Navigable Slide Index
- Introduction
- Why is genetic of animal health important?
- Why genetics?
- Heritability
- Heritability metaphor
- Types of heritability
- Phenotype as a function of genetics & environment
- Genetic gain
- Health traits
- Health traits properties
- Different Health traits
- Viral diseases
- Viral diseases - genetic variation
- Sire prevalence for BVD
- Udder traits (cattle)
- Udder traits (sheep)
- Udder traits: genetic variation across the species
- Lameness (cattle)
- Lameness (sheep)
- Other bacterial diseases
- Fertility traits (dairy cows)
- Metabolic diseases
- Parasites
- Summary of genetic parameters
- Genetic trends
- Somatic cell score - dairy
- Somatic cell score - dairy (more evidence)
- Mastitis - dairy
- Other diseases - dairy
- Fear of the unknown
- Genetic correlations
- Correlations with performance (dairy cows)
- Correlations with performance (beef)
- Correlations with performance (beef): another study
- Correlations with performance (sheep)
- Intermediate summary
- Implications of low heritability
- Increase accuracy of selection
- Predictor traits
- Predictor traits (examples)
- Indirect selection – goal trait mastitis
- Predictor traits (more examples)
- Predictor traits (last examples)
- Summary
- New technologies - genomics
- Genome wide association studies
- Genome-wide enabled selection
- New technologies – other omics
- Summary and conclusions
- Extra reading
- References (1)
- References (2)
Topics Covered
- Importance of genetic of animal health
- Heritability
- Phenotype as a function of genetics & environment
- Genetic gain
- Health traits
- Viral diseases
- Udder traits: genetic variation across species
- Lameness (cattle & sheep)
- Bacterial diseases
- Fertility traits (dairy cows)
- Metabolic diseases
- Parasites
- Genetic trends
- Somatic cell score
- Mastitis and other diseases
- Genetic correlations between traits
- Increase accuracy of selection
- Predictor traits
- Indirect selection
- New technologies (genomics and others)
- Genome wide association studies and enabled selection
Talk Citation
Berry, D. (2013, December 1). Genetics of animal health [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved October 8, 2024, from https://doi.org/10.69645/VFLP4059.Export Citation (RIS)
Publication History
Financial Disclosures
- Dr. Donagh Berry has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.
A selection of talks on Genetics & Epigenetics
Transcript
Please wait while the transcript is being prepared...
0:00
DONAGH BERRY: Hello.
My name is Donagh Berry and I am
an animals quantitative geneticist
at Tegasc, Moorepark, in Ireland.
I'm going to talk to you about
the genetics of animal health.
0:13
With increasing world human
population size and affluence,
there is expected to be a large
increase in the demand for food.
To achieve this demand,
animal health is fundamental.
There's also increasing
consumer concern, especially
in the developed world, on
food safety, especially when it
comes to zoonotic
diseases, which can be
transmitted from animals to humans.
And then finally, there's
also increasing concern
over animal health and welfare.
0:44
Genetics is particularly
advantageous in that it is what
we call cumulative and permanent.
So in other words, we can
introduce or introgress
good genes into a population.
And these can be built
on with each generation.
On the converse, however,
if you introduce bad genes,
they can be very
difficult to breed out.
So therefore, genetics must
form part of an overall strategy
to improve the animal health
status of our world population.
1:15
I would argue that
the heritability is
probably one of the most
misinterpreted statistics
in quantitative genetics.
The heritablity depicts the
proportion of the field variation
attributable to genetics.
So in other words, if you went
to a population of animals, what
proportion of the differences
or variation amongst those
animals is actually
due to differences
in their genetic makeup?
Now, a key point to remember
about heritablity and variation
is that a small proportion of
a trait with lots of variation
may actually exhibit more variation
than a moderate proportion
of a trait with little variation.