Best Method for Heritability Estimation
Best method of heritability estimation which is relatively free from biases is-
- Half sibs correlation method — Correct Answer
- Full sibs correlation method
- Intra-sire regression
- Dam-daughter regression
Explanation:
Correct Answer: Half sibs correlation method
The Paternal Half-sib correlation method is considered the best and most bias-free method for estimating heritability because paternal half-sibs (daughters of the same sire by different dams) share only ¼VA and, importantly, are usually raised by different mothers — minimising the confounding common environmental effects (VEC).
Methods of Heritability Estimation — Reliability Comparison
| Method | Covariance Used | Formula | Reliability |
|---|---|---|---|
| Half-sib correlation (Paternal) | ¼VA | h² = 4t | Best — free from maternal/common environment bias |
| Intra-sire regression (offspring on parent) | ½VA | h² = 2b | Good — avoids assortative mating bias |
| Dam-daughter regression | ½VA | h² = 2b | Moderate — may include maternal effects |
| Full-sib correlation | ½VA + ¼VD + VEC | h² = 2t | Least reliable — overestimates due to VD and VEC |
📚 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.
