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4. Breeding goals and characteristics (traits) of dairy cattle, milk properties
Terms in this set (9)
Systematic production of breeding and commercial animals of defined pedigree and production traits
What is the goal?
Deviation of the individual genetic merit from the mean genetic merit of a reference population
What is the breeding value of an animal?
Breeding associations and organizations
Who are breeding programmes performed by?
Breeding poulation, marking of animals and identification, safety of descent and origin of animals (guaranteed by mating, parturition, bloodgroups, DNA analysis), clear breeding goals (traits, breeding value, selection criteria)
Mention some corner points
Meat performance, reproductive performance, fertility, calving ease, health, milking ability, conformation, hereditary disorders
What are the most important performance traits used in diary cattle selection (performance testing for breeding)?
Average milk yield (kg), max daily milk yield (kg), FCM - Fat corrected milk yield (kg), fat yield (kg) and protein yield (kg)
Milk performance testing
Fat content (%), protein content (%), protein to fat ration, fat protein difference, lactose content (%) and somatic cell count
How do you check chemical composition of milk?
Milk yield (kg), relative milk yield (kg), milk content %, fat & protein yield, milking ability, other factor can be color, fatty acids, vitamins
Primary trait is the milk-producing ability, which factor is being checked?
Conformation, reproduction, feed intake - conversion radio, adaption, health, resistance, others
Name secondary traits of dairy cattle
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