engleski

Acorn Variability in Common oak (Quercus robur L.)

In the work the results of the research concerning the acorn form variability in the common cak (Quercus robur) in Croatia are given. In total 24 populations were analysed, and in each population the analysis of 100 acorns was made. On each acorn, two properties (the length [L] and the diameter [D]) were measured and therefrom the third property - a L/D index was derivated. All measured and derivated data were subjected to the descriptive analysis, regression analysis, variance analysis and multivariate analysis. From the descriptive analysis it can be seen that the data are distributed normally with certain deviations which very likely are due to a strong ecological influence. By the variance analysis the differences in respect to each of the studied properties were determined showing that the populations differ, namely coicide among themselves depending upon the microhabitat, regardless of their regional belonging. Similar results were obtained by the multivariate cluster analysis, where the similarity level for the analysed populations was determined.

Quercus robur, common oak, acorn, multivariate analysis

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