Upgrade to remove ads
Only $35.99/year

Ans 352

Terms in this set (45)

Which of the following should be the first step in developing a genetic plan?
Define production system and breeding objectives
Hyrid vigor is calculated as the difference between the average performance of crossbreds and....
the average performance of all purebred parental breeds
Hybrid Vigor is the result of what type of gene action?
Dominance
Hybrid vigor is linearly related to the amount of
Heterozygosity
How much of the potential F1 Hybrid Vigor is retained after 5 generations of Inter Se mating?
50%
The proportion of an individual's loci at which one allele traces to one parent breed, and the other allele traces to a different parent breed.
Percent Retained Hybrid vigor
An improvement in the environment provided by a crossbred dam (relative to the environment provided by a purebred dam) that influences the performance of her offspring
Maternal Hybrid vigor
A crossbreeding system in which generation of females are rotated among sire breeds in such a way that they are mated to sires whose breed composition is most different from their own
Rotational Crossbreeding system
An increase in the average performance of crossbreds over the average performance of purebred parents
Hybrid Vigor
A mating system where sires of one breed/breed combination are mated to dams of another breed/breed composition to maintain a desirable level of vigor and/or breed complementarity
Crossbreeding system
The effect of an individual's genes, singly and in combination, on its performance for a trait; The 'G' in the genetic model
Genotypic Value
The Gene Combination Value includes effects coming from what type(s) of gene action
Dominance and Epistasis
the effect of a single allele, regardless of all other alleles
independent gene effect
The value of an individual as a genetic parent
breeding value
Half of an individual's breeding value; the expected difference between the average performance of the individual's progeny and the average performance of all progeny, assuming randomly chosen mates
expected progeny difference (EPD)
Sets with similar terms