...
| Paneel | ||||||
|---|---|---|---|---|---|---|
| ||||||
DefinitionLong term genetic contribution is a measure of relatedness in the population because of a shared common ancestor. There is a relation between the long term genetic contribution of an animal to the population and the rate of inbreeding in the population. |
If you would consider your own pedigree and that of your neighbour, you will find common ancestors if you go back far enough in time. Eventually, everyone is related. The point is that how close you are related will depend on the number of offspring that your common ancestor(s) produced and the number of generations between the common ancestor and the present individuals. The more offspring, the more ‘paths’ there are to the common ancestor, and the larger the proportion of genes you share with that common ancestor. The same principle can be applied to animal breeding, though in general the process of shared genes from common ancestors goes a lot faster because the breeding population is relatively small, and introduction of animals from outside the population usually is not practised. After a number of generations, (almost) all animals are related to that common ancestor. After some more generations the contribution of the common ancestor does not change anymore: (almost) all animals have the same proportion of genes of that ancestor in common.
| Onderliggende pagina's (weergave met onderliggende items) |
|---|