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Genetic Diversity in Protoplast- and Cell-Derived Plants of Potato

1987; Springer Nature; Linguagem: Inglês

10.1007/978-3-642-72773-3_25

2512-3696

E. Jacobsen,

Plant tissue culture and regeneration

In the past decades, potato breeding research has been mainly focussed on the introduction of genes for disease resistance. Reduction of the ploidy level from tetraploid to diploid (Hougas and Peloquin 1957) and even to monoploid (Jacobsen 1978 a) opened the way to transfer such important resistance genes more easily from diploid wild species into cultivated potato. Despite all breeding activities, old varieties like Bintje in the Netherlands (Anonymous 1984) and Russet Burbank in the USA (Shepard et al. 1980), are still used and they cover a relatively large part of the area cultivated with potato. Because of the use of fungicides, nematocides and the production of healthy seed potatoes, these varieties, highly susceptible to pests, have survived all alterations of cultivation and have, therefore, stayed attractive for the farmer. Negative characters of these varieties have not been removed by classical mutation breeding (Shepard et al. 1980).