True Statements on Repeatability
Which of the following is true about repeatability of a trait-
- It is used to predict future performance from past records
- It is used to predict MPPA
- It is the upper limit of heritability in broad sense
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
All three statements about Repeatability (r) are correct as per the standard definition:
- It is used to predict future performance from past records (regression of future on present performance).
- It is used to predict MPPA (Most Probable Producing Ability) / ERPA (Expected Real Producing Ability).
- It is the upper limit of heritability in broad sense (H²B), because repeatability = (VG + EP) / VP which always ≥ VG/VP.
Repeatability — Key Facts
| Index | Heritability (h²) | Repeatability (r) |
|---|---|---|
| Formula | h²N = VA/VP | r = (VG + EP) / VP |
| Definition | Regression of breeding value on phenotypic value | Regression of future performance on present performance |
| Use | Predict breeding value | Culling decisions; estimate MPPA |
| Range | 0 to 1 | 0 to 1 |
| Relationship | Lower limit | Upper limit of H²B |
Why Other Options Are Wrong
- Each individual statement (a, b, c) is correct on its own — hence "All the above" is the correct choice.
📚 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.
