Abstract
ABSTRACT The genetic relationship of five Greek okra cultivars was studied by using the following traits: (1) weight of dry pods, (2) number of dry pods, (3) plant height, (4) number of stems, (5) length of pods, (6) width of pods, (7) general combining ability, (8) heterosis over the mid-parent, (9) heterosis over the best-parent, and (10) specific combining ability. The data were analyzed by cluster analysis (CA) using UPGMA (Unweighted Pair Group Method Using Arithmetic Averages) and by principal component analysis (PCA). Dendrograms, based on average taxonomic distance (DIST) and product moment correlation (CORR) matrices, showed a close relationship between the cultivars ‘Pylaca’ and ‘Chalkis’, and an even closer relationship between the cultivars ‘Veloudo’ and ‘Boyati’. The cultivar ‘Kilkis’ was grouped individually. PCA was congruent with the cultivar groups defined by the dendrograms and gave supplementary information on the usefulness of the traits for the definition of the groups.
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