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Clonal selection has a very important mission in the growth of the grape production and the grape's quality. It represents a step foward in the selection works, because it contributes to a radical improvement of existing varieties of grapes. It consists in choosing and multiplying separately the best vegetative descendents, from the most valuable vines (Neagu M.I.). Many varieties spread in culture have alack of economic value, while others degenerate while growing in heterogeneous populations, making the value of vineyards , established without taking measures to apply the selection, to decrease gradually. The increase of the biological potential of vinifera varieties in culture and expansion of valuable logs can be made through clonal selection. Through the work of clonal selection of the vine at INCDBH Ştefàneşti we obtained a new selection of variety Muscat Ottonel, thus contributing to the improvement of the range of table grapes varieties. Elite clonal Muscat Ottonel St 16. was approved in 2008, being selected high quality variety. In the work of clonal selection, started in ştefáneşti in 1996, has been used a new scheme that included 3 major parts: mass selection and positive selection in elite clonal planting parent, followed by their rapid growth.; Comparative study of elites in terms of potential productivity, the quality of grapes, testing plant breeding clones performing their ISTIS entry. [ABSTRACT FROM AUTHOR]

Little is known about the genetic determinism of muscat flavor in grape, although this trait is of major importance for table grape breeding. We therefore performed a search for QTLs (Quantitative Trait Loci) of both muscat score and berry content in the three main free monoterpene alcohols potentially involved, linalool, nerol and geraniol, based on two years of measures. Parental and consensus framework genetic maps of the cross MTP2687-85 (Olivette × Ribol) × Muscat of Hamburg were built after genotyping the 174 offspring for 139 well-scattered SSR markers. The female, male and consensus framework maps spanned 935, 1365 and 1267 cM, respectively. For QTL detection, simple and composite interval mapping were performed, as well as non parametric Kruskal–Wallis tests. QTLs for muscat score were found on linkage groups (LGs) 1, 5 and 7. For the three ln-transformed monoterpene contents, QTLs with major effects (explaining 17–55 % of total phenotypic variance) were found to be colocated on LG 5, on the male and consensus maps in both years. One additional QTL was found for linalool on LG 2, on female and consensus maps, as well as other colocated ones for nerol and geraniol on LG 13, on male and consensus maps. These additional QTLs had lower effects (9–25%). The contribution of these results to the knowledge of muscat aroma genetic determinism is discussed, as well as their potential usefulness for marker assisted breeding of new aromatic grape varieties. [ABSTRACT FROM AUTHOR]