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Abstract
Wine yeasts have been shown to be characterised by marked chromosome‐length polymorphism. Study of this polymorphism could explain some of the genetic characteristics of these strains and, furthermore, lead to their precise identification, which is still an unresolved problem in the farm‐produce industry. With this aim in mind, we characterised the electrophoretic karyotype of 52 flor strains, isolated from the films of the following Sardinian wines: Cannonau, Malvasia di Bosa and Vernaccia di Oristano.