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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The maintenance of corolla colour polymorphism in \kur{Dactylorhiza sambucina} (Orchidaceae)
 KREMLOVÁ, Markéta
The European rewardless orchid Dactylorhiza sambucina commonly produces yellow- and purple-flowered individuals in frequencies that in different populations range from balanced to very unbalanced ones (we can find even monochromatic populations). I studied female reproductive success of the two morphs in four populations in the Beskydy Mountains in the eastern part of the Czech Republic. The data obtained from the crossing experiment showed that seed mass, proportion of seeds with big embryo, proportion of seeds without embryo and viability of seeds depend neither on the type of crossing, nor on morph colour. They depended only on the locality.
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The effect of abiotic and biotic factors on corolla colour polymorphism in \kur{Dactylorhiza sambucina} (Orchidaceae)
 KREMLOVÁ, Markéta
The European rewardless orchid Dactylorhiza sambucina commonly produces yellow- and purple-flowered individuals in frequencies that in different populations range from balanced to very unbalanced ones (we can find even monochromatic populations). I studied an effect of abiotic factors (soil pH, hydrolimits, slope and altitude of the locality), biotic factors (weight and viability of the seeds obtained from crossing between and within morphs) and the size of the populations on corolla colour of two morphs in European populations (the Czech Republic, Italy, Austria, Germany, France).
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