Inbreeding depression

Inbreeding is the mating of relatively close blood relatives. In plant breeding, this is done by self-pollination (self-fertilisation) and crossing of close relatives in order to obtain inbred lines that are as genetically homozygous (pure) as possible. In animal breeding, inbreeding occurs through sibling mating and back mating. The measure of inbreeding is the inbreeding coefficient. Inbreeding depression stands for the loss of genetic fitness and performance due to the continuous crossbreeding of individuals of the same lineage. The effect can occur when crossing new grape varieties if positive characteristics of a variety are to be strengthened and therefore ancestors are continuously crossed.

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Inbreeding depression

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