Flashcards in CH. 12 Deck (22):
Large-Scale Genetic Evaluation
The genetic evaluation of large pops- typically entire breeds
A test designed to compare the performance of animals (usually young males) from different herds or flocks for growth rate and feed conversion by feeding them at a central location.
A carefully monitored progeny test designed to eliminate sources of bias like nonrandom mating and culling for poor performance.
Data that are regularly reported by individual breeders to breed associations or g'vt agencies
A list of genetic predictions, accuracy values, and other useful info about sires in a breed
(in dairy publications): accuracy of prediction
A range of values within which we expect- with a given probability, a given degree of confidence- that a true values of interest lies.
Possible change (PC) or standard error of prediction
A measure of accuracy indicating the potential amount of future change in a prediction
An EPD for an animal with progeny data Parent EPDs typically come with associated accuracy measures
An EPD for an animal w/o progeny data. Nonparent EPDs typically don't come w/associated accuracy measures
A genetic prediction based solely on pedigree data
An updated EPD that is calculated between BLUP analyses and incorporates new info.
(On large-scale genetic evaluation): the level of genetic merit associated w/an EPD of zero
(in large-scale genetic evaluation) the year chosen to represent the base. The avg EPD of all animals born in the base yr is zero.
The reporting of only selected performance records to a breed association or g'vt agency
The degree to which data from different contemporary groups within a pop can be compared as a result of pedigree relationships between animals in different groups.
Genotype by Environment (GxE) interaction
A dependent relationship between genotypes and environments in which the difference in performance between two (or more) genotypes chages from environment to environment
Nucleus Breeding Scheme
A cooperative breeding program in which elite animals in which elite animals are concentrated in a nucleus herd or flock and superior germ plasm is then distributed among cooperating herds or flocks
Natural mating (as opposed to artificial insemination)
CLosed Nucleus Breeding Scheme
A nucleus breeding scheme in which germ plasm flows in only one direction- from the nucleus to cooperating herds or flocks.
Open Nucleus Breeding Scheme
A nucleus breeding scheme in which the flow of germ plasm is bidrectional- from the nucleus to cooperating herds or flocks and from cooperating herds or flocks to the nucleus