1) Suppose you know the following information about 3 loci that influence yearli

Question

1) Suppose you know the following information about 3 loci that influence yearling weight in sheep Allele Independent Gene Effect Locus +6 -6 a) The average yearling weight for a population of rams is 160lbs. Complete the following table (0.5pt for each animal so 2pt for the entire table) AnimalGenotype Additive Genotypic Environmental Phenotype Effect Gene Gene Value Combination Value Value AaBbCc AaBBCo AABbcc AAbbCC +5 Rampage Rambo Rambler Rams -6 2 +6 +0 b) Which Ram is heaviest? (0.5pt) c) Which Ram has the highest estimated breeding value? (0.5pt) d) Calculate the EPD for each animal? (1pt) Animal Rampage Rambo Rambler Rams EPD

Explanation / Answer

Addictive gene value or breeding value: It is the additive effect of all the alleles present on the locus during crossover ( independent gene value).

Genotypic value: It is the addition of breeding value and gene effects.

Phenotype value: It is the combination of genotypic value plus environment effect

So, from the definition

Animal    Genotype   Additive gene value Gene combination value Genotypic value Environmental effect phenotype

Rampage    AaBbCc 0 +5    +5 +3 +8
Rambo   AaBBCc +12   +1 +13 -6 +7
Rambler   AABbcc -10       +4    -6 -2 -8
Ramsey   AAbbCC +6 +0 +6 +6 +12

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