Assume the mean number of eggs a hen lays per year in a particular flock is...
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Assume the mean number of eggs a hen lays per year in a particular flock is 234. Given in the following table are values for some of the genetic and environmental effects that influence egg laying prolificacy for two hens, Princess Lay-a, and Dora the Eggsplorer. Assume the contemporary group effect is + 1.1 eggs. *Note: this is a hypothetical example. In real life we would not know the "true" values for these individual genetic and environmental effects, only their estimates. Term BV Ep ET Princess Lay-a 1st year +7.70 eggs +1.35 eggs -1.65 eggs 2nd year +7.70 eggs +1.35 eggs 3.65 eggs Dora the Eggsplorer 1st year 2nd year -2.50 eggs -2.50 eggs +4.15 eggs +4.15 eggs +0.85 eggs +3.85 eggs a. [6 points] The first year, Princess Lay-a produced 248 eggs. Dora produced 235 eggs. What is the total genetic effect for each hen? b. [6 points] In the 2nd year of laying, does Princess Lay-a or Dora the Eggsplorer produce more eggs? How much more/less than the other? Strategy: quantitative genetic model Producing Ability (PA₂) Breeding Value (BV;) Concept Definition (for a trait) Model (for an individual) Parameter (for a population) Prediction Application Phenotype (P₁) A single performance P₁ = μ + BV₁ + GCV₁ +Epi + Ecgi + Eti P₁ = μ+ G₁ + E₁ f = obv + occv +0+0+0 0px ox P₁ = P + bp.x(X₁-X) Marketing bp.x = Repeated performance PA₁ = BV₁ + GCV₁ +Epi PA₂ = G₁ + Epi "" obv + ocv +o of bPA-P = r PA₁ = bpA-P(P₁-P) Commercial (culling) Additive part of performance BV₁ = BV₁ h² Y bBv.p =h² BV₁ = bgv.p (P₁-P) Seedstock (selection) Assume the mean number of eggs a hen lays per year in a particular flock is 234. Given in the following table are values for some of the genetic and environmental effects that influence egg laying prolificacy for two hens, Princess Lay-a, and Dora the Eggsplorer. Assume the contemporary group effect is + 1.1 eggs. *Note: this is a hypothetical example. In real life we would not know the "true" values for these individual genetic and environmental effects, only their estimates. Term BV Ep ET Princess Lay-a 1st year +7.70 eggs +1.35 eggs -1.65 eggs 2nd year +7.70 eggs +1.35 eggs 3.65 eggs Dora the Eggsplorer 1st year 2nd year -2.50 eggs -2.50 eggs +4.15 eggs +4.15 eggs +0.85 eggs +3.85 eggs a. [6 points] The first year, Princess Lay-a produced 248 eggs. Dora produced 235 eggs. What is the total genetic effect for each hen? b. [6 points] In the 2nd year of laying, does Princess Lay-a or Dora the Eggsplorer produce more eggs? How much more/less than the other? Strategy: quantitative genetic model Producing Ability (PA₂) Breeding Value (BV;) Concept Definition (for a trait) Model (for an individual) Parameter (for a population) Prediction Application Phenotype (P₁) A single performance P₁ = μ + BV₁ + GCV₁ +Epi + Ecgi + Eti P₁ = μ+ G₁ + E₁ f = obv + occv +0+0+0 0px ox P₁ = P + bp.x(X₁-X) Marketing bp.x = Repeated performance PA₁ = BV₁ + GCV₁ +Epi PA₂ = G₁ + Epi "" obv + ocv +o of bPA-P = r PA₁ = bpA-P(P₁-P) Commercial (culling) Additive part of performance BV₁ = BV₁ h² Y bBv.p =h² BV₁ = bgv.p (P₁-P) Seedstock (selection)
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a To calculate the total genetic effect for each hen we need to add up the effects of breeding value BV permanent environmental effect EP and temporar... View the full answer
Related Book For
Statistical Techniques in Business and Economics
ISBN: 978-0078020520
16th edition
Authors: Douglas Lind, William Marchal
Posted Date:
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