An impact of polyploidization on the dimension of red clover flowers, species' composition and number of insect pollinators
2000
Bender, A. (Jogeva Plant Breeding Inst., Jogeva (Estonia)
In 1993 a field experiment was established in 4 replications the plot size at full bloom stage being of 10 m (2), to study the range of morphological and secretory transformations of the flowers of tetraploid red clover varieties 'Varte' (early) and 'Ilte' (late), both bred at Jogeva, and the possible effect of these changes to the species' composition and number of pollinators. The results of measurements indicated thet the tetraploid varieties, derived by experimental polyploidization prior to selection, possess ca 10 per cent longer corolla tube, theorifice of which is 30 per cent more spacious. High seed yields harvested from the trial plots on some years prove a very high potential seed yield capacity of the tetraploid varieties bred at Jogeva, the expression of which is, however, dependent not only on the weather conditions during bloom and harvest season, but also on the species' composition and number of natural pollinators
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