The high presence of heterozygosity in the species Vitis vinifera, makes it useful the use of self-pollination as an instrument for genetic improvement (Mullins et al., 1992). The genetic recombination that is achieved with self-pollination may cause the appearance of new morphological characters (Todorov, 1981, 1987, 1992, 1995), allowing the use of the filial generation for the selection and creation of new varieties. With the aim to increase the variability in the population of Sagrantino di Montefalco (variety with the polyphenol content higher of all the Italian varieties) (Mattivi et al., 2002b) and select some genotypes with superior characteristics (best value anthocyanin / polyphenol ) in 1999 was made a self-pollination of this cultivar. The recombinant genetic profiles of the progenies are useful for identifying the parents and the unknown origins of this ancient variety. The study was carried out at the “Azienda Agricola Arnaldo Caprai” and has provided, in the years 2006 and 2007, the study of 250 genotypes selected from the 1800 obtained by self-pollination. 37 of these showed white berry, in relation to the appearance of the character recessive for the gene of color (Bonner and Oliveira, 1990). From the analysis of the data collected in 2006-2007, it was observed that, starting from a red berry cultivars, have been obtained genotypes with white berry very different from each other, with a high variability for the considered parameters (production, phenology, acidic levels, pH, polyphenol content). In order to select individuals with white berry with different peculiarities both for phenological, qualitative and quantitative parameters were chosen six genotypes of original 37 that were representative of the various groups identified by cluster analysis. For these individuals were collected additional data in 2010 which have revealed that, due to the type of selection, have been maintained a good representation of the variability of the starting group allowing also to identify some genotypes particularly interesting for a future enrollment in the national varieties register.
|Titolo:||NEW WHITE GRAPE VARIETY OBTAINED FROM SELF-POLLINATION OF "SAGRANTINO" RED GRAPE VARIETY FROM UMBRIA (Italy)|
|Data di pubblicazione:||mag-2013|
|Parole Chiave:||self-pollination ; segregation ; genetic improvement ; Sagrantino|
|Settore Scientifico Disciplinare:||Settore AGR/07 - Genetica Agraria|
|Citazione:||NEW WHITE GRAPE VARIETY OBTAINED FROM SELF-POLLINATION OF "SAGRANTINO" RED GRAPE VARIETY FROM UMBRIA (Italy) / L. VALENTI, I. GHIGLIENO, L. SMALZI, F. CARLETTI, M. DELL’ORTO. ((Intervento presentato al 3. convegno Ampelos tenutosi a Santorini nel 2013.|
|Appare nelle tipologie:||14 - Intervento a convegno non pubblicato|