Looseberryness in Grapevine: a segregation analysis of a Pinot x Pinot population
Abstract
Wine quality, mainly of red varieties is affected by the cluster morphology. Compact clusters are at heightened risk for the development of bunch rot (B. cinerea) which is one of the most economically impacting diseases in grapevine (Vitis vinifera L.). Additionally, compressed berries of tight bunches often are prone to damages in the berry skin and thus limit free water evaporation. Loose clusters have prolonged pedicels and extended rachis leading to higher fruit quality due prolonged ripening periods and healthy fruits. The cultivar Pinot noir belongs to one of the most ancient grapevine cultivars of Vitis vinifera L. and exhibits three naturally occuring phenotypes: clusters with small berries (leading to loose clusters); clusters with normal size berries but enhanced rachis and pedicels (leading to loose clusters) and clusters with normal size berries forming tight bunchen (compact clusters) These phyenotypes have been described as mutations and are sustained by clonal selection.Previous work suggested that a mutation located within an expansin gene expressed in V. vinifera can be found in loose clusters of Pinot noir (Vaclavicek 2004); but not in compact clustered clones of the same cultivar. This project further analyses molecular markers associtated with loos berryness in Pinot noir employing a segregating population deriving from a cross of a compact and a looseberried Pinot noir clone.
Project staff
Astrid Forneck
Univ.Prof. Dipl.-Ing.sc.agr.Dr.sc.agr. Astrid Forneck
astrid.forneck@boku.ac.at
Tel: +43 1 47654-95811
Project Leader
01.03.2010 - 28.02.2011
Ulrike Anhalt-Brüderl
Dr. Ulrike Anhalt-Brüderl
ulrike.anhalt@boku.ac.at
Tel: +43 1 47654-95815
Project Staff
01.03.2010 - 28.02.2011