Mathematical approach to evaluation of the influence of climate indicators on quality of grapes in syrah clones

The aim of the present study is to apply a mathematical approach (correlation and factor analysis) to assess the similarity and remoteness of the impact of climate indicators in some clones of Syrah variety. Their grouping is based on phenological, and technological indicators. Temperatures during the individual experimental years have a dominant influence on the quality of grapes in the individual clones included in the study. As a result of analysis, correlations were established between phenological indicators like follow: sap, bud burst, first leaf separation, flowering, fruit set, veraison, ripeness and technological ones - average mass per bunch, normal and undeveloped berries, percent of clusters and damaged berries, average bunch size (width and length). The phenological indicators - sap flow, flowering and fruit set "pea size" and technological - undeveloped berries, damaged berries have high factor weights in the first component, which is a summary of these indicators, with the highest relative weight in the vines grouping.