Predicting response to selection
25 important questions on Predicting response to selection
Which steps are required to achieve a response to selection, and thus to make genetic progress or genetic gain?
- Select the best for breeding
What factors are depended on to have success of the selection descision?
- How much genetic variation for that trait is present in the population?
- What is the average accuracy of the EBV, and thus the accuracy of selection?
- What proportion of the animals will be selected for breeding?
- How long is a generation?
Why can the selection proportion not be unlimited small?
- Few animals selected as parents with large number of offspring result in many animals that are closely related in the next generation and thus a rate of inbreeding that may exceed the limit of .5-1% set by the FAO
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What is important to balance to optimace the successs of a breeding program?
What is the selection differential (S)?
What is the selected response (R)?
Why is mass selection the most elementary type of selection?
What is the formula for R?
= S*h2
What is the formula for deltaG?
What is an important assumption in evaluating predictions of genetic gain?
What does the selection intensity do?
What is the result of knowing the phenotypic variance and the selected proportions?
What is the general formula for predicting genetic gain?
By which factors is genetic gain determined?
- Accuracy of selection
- The genetic standard deviation
How can you optimise genetic gain?
How do you calculate slection response of males and females?
What is the selection path sires to breed sires (SS)?
What is the selection path sires to breed dams (SD)?
What is the selection path dams to breed sires (DS)?
What is the selection path dams to breed dams (DD)?
Where can selection response be divided into?
Where do decisions on the intesnity of selection depend on?
What is an indicator trait?
What are the requirements for success of the indictator trait?
When can indirect selection be a good solution?
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