Selection and mating

7 important questions on Selection and mating

Where do mating decisions have influence?

No influence at population level, but may have some effect at the level of individual mating

What are the factors that can explain why the offspring may deviate from the expectation?

- Mendelian sampling. This introduces a chance factor, even if you know the EBV of the parents very accurately
- Pleiotrpoic (one gene effects multiple traits) and epistatic effect (gene-gene interactions)
- What is the accuray of the information that the selection is based on?
- Environmental effects

What does compensatory mating involve?

Finding the best mate for individual females to compensate her shortcomings
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Why should mate selection take the additive genetic relationship between both potential parents into account?

Because it directly influences the inbreeding coefficient of the offspring: F= half the additive genetic relationship between the parents

What is the formula for the influence of the genetic contribution of animals to the rate of inbreeding?

deltaF=1/4somc2

How can de spread of recessive genetic orders be increase?

With intensive use of breeding animals. The disorder will hve spread widely before it is recognised as such

How can pedrigree records be kept accurate?

The parentage of the offsping can be DNA tested

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