Characterization of grape berries of same local varieties in Morocco

Abstract

Ampelography is the first step in grapevine selection, in establishing the relationship between grape cultivars. In this study grape berries collected from grapevine grow in the Northwestern of Morocco. A total of 15 grape berries from 39 accessions were characterized using OIV descriptors. We calculate the Average quantitative parameters of the all berries collected. The analysis of variance for the quantitative parameters of the berries shows that the ratio Long/Width of the berries is the only character that shows the significant variations. A highly significant correlation of length with width and weight can be observed with respectively 0.860 ** and 0.873 **. Principal Component Analysis with Quantitative Berry Parameters show some trees of the same variety are grouped together but they are no a clear structuring of trees according to their varieties; this may be due to the problem of synonymies and homonymies generally very common in local varieties.