Accelerating Genetic Progress in ONBS
In ONBS, faster genetic progress can be achieved by using-
- MOET & Sibling test — Correct Answer
- MOET & Progeny test
- MOET & Individual selection
- MOET & Pedigree selection
Explanation:
Correct Answer: MOET & Sibling test
Combining MOET (Multiple Ovulation and Embryo Transfer) with Sibling tests gives the maximum genetic gain per year in ONBS. MOET multiplies the number of full-siblings per elite dam, and sibling testing rapidly evaluates males without waiting for progeny.
How MOET + Sibling Test Accelerates Genetic Progress
- MOET: Superovulates elite cows (nucleus females) → multiple embryos → transferred to recipient (multiplier) cows → many full siblings per elite dam per year
- Sibling test: Some siblings (sisters) are performance-tested → their records predict the breeding value of their brothers → males selected early without waiting for their own daughters
- Combined effect: Short generation interval + high selection intensity + good accuracy = maximum ΔG/year
ONBS Structure
| Population Tier | Role | Size |
|---|---|---|
| Nucleus herd (N) | Elite females; genetic improvement concentrated here | Top 10–15% of total herd |
| Multiplier/Test herd (M) | Recipient dams; multiplies genetics | Middle tier |
| Village/Commercial herd (V) | Production animals; receive genetic gain | Majority |
📚 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.
