Which of the following is practised to overcome for average productivity in animals w.r.t. milk production, growth rate in beef cattle etc?

Options

A. Out- crossing
B. Inter specific hybridisation
C. Crosssbreeding
D. inbreeding

Answer

To solve the question regarding which practice is used to overcome average productivity in animals, particularly concerning milk production and growth rates in beef cattle, we can analyze the provided options step by step:

### Step-by-Step Solution:

1. **Understand the Options**: The options given are:
- A) Outcrossing
- B) Interspecific Hybridization
- C) Cross Breeding
- D) Inbreeding

2. **Define Inbreeding**: Inbreeding involves mating closely related animals. This often leads to inbreeding depression, which decreases productivity due to a lack of genetic variability. Thus, inbreeding is not a suitable method for improving productivity.

3. **Define Cross Breeding**: Cross breeding is the mating of two different breeds to produce hybrids that possess desirable traits from both parents. This method can improve productivity, but it is not specifically aimed at overcoming average productivity in the same way as outcrossing.

4. **Define Interspecific Hybridization**: Interspecific hybridization involves crossing two different species within the same genus. While this can lead to improved varieties, it is not the primary method used for enhancing productivity in beef cattle or milk production.

5. **Define Outcrossing**: Outcrossing is the practice of mating animals that have no common ancestors. This method introduces genetic diversity and can significantly enhance productivity in terms of milk production and growth rates in beef cattle.

6. **Conclusion**: Based on the definitions and their implications for productivity, outcrossing is the most effective method among the options provided for overcoming average productivity in animals, especially in beef cattle and milk production.

### Final Answer:
The correct option is **A) Outcrossing**.

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