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ISHS Acta Horticulturae 547: III International Symposium on Rose Research and Cultivation

ROSE BREEDING TECHNOLOGIES

Author:   S. Gudin
Abstract:
Up to now, rose breeding practices have not changed drastically since the bursting of this activity during the eighteenth century. Nethertheless, they have beneffited since the 1960's from the gathered scientific knowledge mainly concerning the sexual reproduction physiology of the species. Thus, good pollination and germination conditions have been precised. Furthermore, selection procedures corresponding to new objectives, such as e.g. low temperature and disease tolerance or increased shelf life, have been used. Although some techniques such as induced mutation breeding did not lead to convincing achievements in roses, some biotechnologies have been successfully applied by a few breeders. Conventional genetic results have been scarce and seldom up to the 1980's, probably because of the high heterozygositic and low sexual reproduction status of the species. Since the last decade, molecular markers have been used to explore the rose genome. No doubt that marker assisted selection will soon be available to breeders. Together with the recently started use of still unexploited wild species genes, and considering the already high genetic variability of the actual cultivars, this could lead in the next decades to the creation of revolutionary varieties, especially in terms of resistance to diseases, pests, cold, drought, and plant and flower shapes and growth habits. Hence, will there be room for a profitable application of transgenesis ? Probably more than on transformation feasability, which has already been demonstrated on roses, this will depend on the accuracy of the choice of the character to be improved thus
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