Definition of Intensity of Selection
The ratio of selection differential to the phenotypic standard deviation of a trait is known as:
- Response to selection
- Accuracy of selection
- Intensity of selection — Correct Answer
- Limit of selection
Explanation:
Correct Answer: Intensity of selection (i)
The ratio of selection differential (S) to the phenotypic standard deviation (σp) is the intensity of selection (i).
Formulae for Selection
- i = S / σp (Intensity of selection)
- S = i × σp (Selection differential)
- R = h² × S = i × h² × σp = i × σA × rAP (Response to selection)
Factors Affecting Intensity of Selection (i)
- Proportion of population selected (fewer selected → higher i)
- Phenotypic standard deviation (σp)
- Sex of animal under selection
- Number of traits under selection
- Accuracy of measurement of the trait
📚 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.
