Vol: 34A Page: 181

Authors:
Joanna Ukalska
Urszula Skórnik-Pokarowska
Agnieszka Masny

Title:
 Multivariate diversity in a variety collection of strawberry (FRAGRARIA x ANANASSA ) : yield and its quality characters

Language: Polish

Keywords:
principal component analysis
cluster analysis
germplasm collection
gentic diversity
strawberry

Summary:
In the paper the authors have made an effort to evaluate, based on phenotypic values, a variation in a variety collection of 153 forms and cultivars of strawberries coming from a collection of the Research Institute of Pomology and Floriculture in Skierniewice. 11 characters describing growth habit as well as quality of fruits were considered. Diversity of genotypes was studied for three groups of strawberries separately: for early maturing strawberries, mid-early maturing as well as late maturing ones. For the distinguished three groups the principal component analysis was applied. Its aim was specify the phenotypic diversity in a possibly small dimension. That allowed to distinguish features with the strongest discriminating power. The division into homogeneous groups was achieved by hierarchical cluster analysis with Ward’s method and the square of Euclidean distance.