Coefficients of Relationship for Mating Systems
Coefficient of relationship of progenies produced by parent-offspring mating, full sib mating & half sib mating are respectively-
- 0.25, 0.25, 0.125
- 0.50, 0.50, 0.25 — Correct Answer
- 0.50, 0.25, 0.125
- None
Explanation:
Correct Answer: 0.50, 0.50, 0.25
Coefficient of Relationship (Rxy) values:
- Parent-offspring mating: Rxy = 0.50
- Full-sib mating: Rxy = 0.50
- Half-sib mating: Rxy = 0.25
Complete Table: Coefficient of Relationship & Inbreeding Coefficient
| Mating Type | Rxy | Fx = ½ Rxy |
|---|---|---|
| Parent-offspring / Full-sib mating | 0.50 (50%) | 0.25 (25%) |
| Half-sib / Double first cousin / Grandparent-grandchild | 0.25 (25%) | 0.125 (12.5%) |
| Single first cousin | 0.125 (12.5%) | 0.0625 (6.25%) |
| Half first cousin | 0.0625 (6.25%) | 0.03125 (3.125%) |
Note on Close Breeding vs Line Breeding
- Close breeding (more intensive): Parent-offspring, Full-sib mating
- Line breeding (less intensive): Half-sib, Cousin, Grandparent-grandchild mating
📚 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.
