Selection of a single vine with particularly positive characteristics in terms of ripening time, grape shape, yield and resistance (resistance) to diseases and the environment, which is then called a clone (100% copy). This is then mostly used in vine nurseries as a so-called mother vine for vegetative propagation. Critics of this form complain about the resulting loss of genetic diversity in such monocultures. This is taken into account by using different clones of a grape variety in a vineyard. By using different clones in a vineyard, a certain risk minimisation with regard to vine diseases or environmental influences can be achieved. In contrast to this is the massive selection. See also breeding and nursery.
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