Type of Selection Involving One Trait at a Time
In which type of selection is only one trait selected at a time?
- Selection index method
- Independent culling method
- Tandem selection — Correct Answer
- Family selection
Explanation:
Correct Answer: Tandem selection
In Tandem selection, only one trait is selected at a time. Once the desired improvement in that trait is achieved, selection shifts to the next trait. It is the least efficient method of multi-trait selection.
Methods of Multi-Trait Selection (given by Hazel and Lush, 1942)
| Method | Key Feature | Efficiency |
|---|---|---|
| Tandem selection | One trait at a time | Least efficient |
| Independent culling | Minimum standard for each trait; fail any → culled | Intermediate |
| Selection index / Total scorecard | All traits simultaneously with weights | Best / Most efficient |
Order of efficiency: Tandem < Independent culling < Selection index
📚 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.
