The aim of this work was to explore the variability of a population of ‘Sangioves’ in order to avoid genetic eroison and evaluate the possibility of initiating clona selection wor, which has not yet been carried out in this are. Observation were carried out on cluster of 31 vines selecter from 7 vineyards from a population fo ‘Morellino’ known as a ‘Sangioves’ biotype, located in the area of porduction of ‘Morellino di Sansano’ red wine in the province of Grosseto (southern Tuscany, central Italy). Cluster had medium density and pyramidal shape with one wing, lower frequencies of dense or loose cluster, conical shape and two wings. Cluster size varied from small to large, Berries were mainly roundish while a low percentage had an elliptical or obovate shape. Considerable variablity was also found in berry size, must sugar conten, titratable acidity, total polyphenols, total anthosyanidins and berry aptitude to anthosyanin extracto. The berry skin anthosyanin profile of some of the presumed clones of this ‘Sangiovese’ population showed a greater predominace of malvidin monoglucoside while lower amounts of cyanidin, petunidin and peonidin monoglucoside were found. Dephinidin monoglucoside was present in the lowest quantity. The extensive variability observed between plants within the same vineyard and between different vineyards allowed a distinction between three groups of presumed clones, based on cluster size, and the existence of clonal differences. These first observation seem to offer a basis for carrying our clonal seleciton, startin from plant health tests.
Cluster and berry characteristics of a "Sangiovese" grapevine population present in the D.O.C. area of "Morellino di Scansano" wine production
SCALABRELLI, GIANCARLO;
2000-01-01
Abstract
The aim of this work was to explore the variability of a population of ‘Sangioves’ in order to avoid genetic eroison and evaluate the possibility of initiating clona selection wor, which has not yet been carried out in this are. Observation were carried out on cluster of 31 vines selecter from 7 vineyards from a population fo ‘Morellino’ known as a ‘Sangioves’ biotype, located in the area of porduction of ‘Morellino di Sansano’ red wine in the province of Grosseto (southern Tuscany, central Italy). Cluster had medium density and pyramidal shape with one wing, lower frequencies of dense or loose cluster, conical shape and two wings. Cluster size varied from small to large, Berries were mainly roundish while a low percentage had an elliptical or obovate shape. Considerable variablity was also found in berry size, must sugar conten, titratable acidity, total polyphenols, total anthosyanidins and berry aptitude to anthosyanin extracto. The berry skin anthosyanin profile of some of the presumed clones of this ‘Sangiovese’ population showed a greater predominace of malvidin monoglucoside while lower amounts of cyanidin, petunidin and peonidin monoglucoside were found. Dephinidin monoglucoside was present in the lowest quantity. The extensive variability observed between plants within the same vineyard and between different vineyards allowed a distinction between three groups of presumed clones, based on cluster size, and the existence of clonal differences. These first observation seem to offer a basis for carrying our clonal seleciton, startin from plant health tests.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
