Estimation Method for Repeatability
Repeatability is generally estimated by-
- Half-sib correlation
- Intra-class correlation — Correct Answer
- Regression
- BLUP
Explanation:
Correct Answer: Intra-class correlation
Repeatability is generally estimated by intra-class correlation (correlation within a class/group). This is calculated from repeated records of the same animal (e.g., multiple lactation records of a cow).
Estimation Methods Summary
| Parameter | Method of Estimation |
|---|---|
| Heritability | Regression of offspring on parent; half-sib correlation (4t) |
| Repeatability | Intra-class correlation (from repeated records) |
| Genetic correlation | Bivariate analysis; sib analysis |
Repeatability Formula
r = (VG + EP) / VP, where EP = permanent component of environment.
- Used in culling decisions (MPPA / ERPA).
- Repeatability is the upper limit of broad-sense heritability.
- Half-sib correlation is used to estimate heritability, not repeatability.
📚 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.
