Скачать или смотреть Selection Index in Animal Breeding | The Formula, Advantages, and Disadvantages | Lecture

Dive into the power of the Selection Index, the core method used in modern animal breeding to maximize genetic merit and profitability!
This lecture explains how a Selection Index simplifies complex genetic decisions by combining multiple traits—like growth rate, marbling, and calving ease—into a single, easy-to-use score.
In this video, you will learn:
• What is a Selection Index? The definition of simultaneous selection for multiple traits.
• The Selection Index Formula: See how Economic Weights (W) and Breeding Values (BV) are combined to create an aggregate score:
\bm{\text{Index} = (W_1 \times \text{BV}_1) + (W_2 \times \text{BV}_2) + \cdots}
• Core Idea & Example: Understand why traits are weighted by their economic value and heritability, and see a practical beef production example.
• Advantages: Why the Index is the most effective method for overall genetic improvement, allowing for beneficial trade-offs between traits.
• Disadvantages: A look at the complexity, data intensiveness, and 'black box' perception of the index.
The Selection Index is the foundation for all modern genetic evaluation (like USDA) and is crucial for breeding not just healthy, but highly productive animals. Watch now to master this essential concept in quantitative genetics!