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Question (English)
The product of realized heritability and selection differential is known as:
- Response to selection ✓ Correct
- Limit of selection
- Intensity of selection
- Accuracy of selection
Correct Answer: Response to Selection
From the notes: Response to selection (R) = h² × S, where h² is realized heritability and S is the selection differential.
Complete Formula (from notes)
R = h²S = i·h²·σP = i·σA·rAP
- h² = realized heritability
- S = selection differential = Mean of selected parents − Mean of all parents
- i = intensity of selection = S / σP
- σA = additive genetic standard deviation
- rAP = accuracy of selection
Genetic Gain Per Year
Genetic gain per year = R / Generation interval (L). Progeny testing increases generation interval and therefore reduces genetic gain per year, even though it is the most accurate method.
Why Realized Heritability?
The ratio of response to selection to selection differential = realized heritability. This is the heritability estimated from the actual response achieved, not predicted.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
