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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 takes place through sibling mating and back mating. The measure of inbreeding is the inbreeding coefficient. Inbreeding depression stands for the loss of genetic resilience or resistance and performance through the continuous crossbreeding of individuals of the same lineage.

Inbreeding effects

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. Inbreeding effects also occur when the berry seeds produced by 99% self-fertilisation during flowering are sown and grow into a seedling. In the course of evolution, many thousands of new varieties have emerged naturally, the best of which have been selected by humans for yield, resistance and flavour. In viticulture, however, propagation is not generative (sexual), but vegetative through the division of a plant.

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The world's largest Lexicon of wine terms.

26,410 Keywords · 47,049 Synonyms · 5,323 Translations · 31,744 Pronunciations · 205,891 Cross-references
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