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National Repository of Grey Literature 60 records found  beginprevious59 - 60  jump to record: Search took 0.00 seconds. 
A cytological, morphometric, and ecological study of \kur{Spergularia echinosperma} in the Czech Republic and its comparison with a closely similar species S. \kur{rubra}
 KÚR, Pavel
In the present study, I dealt with morphological, cytological, and ecological research on a rare Central-European species Spergularia echinosperma and its comparison with a similar weedy species S. rubra. Existence of two cytotypes of S. echinosperma significantly differing in their morphology was revealed, as well as distinct morphological differences between the two species were found. Moreover, the analyses revealed one possibly hybridogenous population. In addition, both the species and the cytotypes were also proven to display different germination behavior, which I correlate with their individual ecological adaptations.
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Polyploidy in sturgeons
 SRP, Jiří
The aim was to study the theoretical backgrounds of sturgeon fish genetics, focusing on aspects of polyploidy cytogenetics and to learn basics of reproduction and rearing of sturgeon fish in conditions of Central European aquaculture. The work describes an overview of methods for determining ploidy levels in fish, methods of artificial reproduction, methods of fish marking, sampling and evaluation of population samples for cytogenetic analysis. The experimental part dealt with samples of different sturgeon species and their hybrids, and the effects of spontaneous polyploidy and interspecific hybridization on biodiversity conservation of these endangered species were discussed.
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National Repository of Grey Literature : 60 records found   beginprevious59 - 60  jump to record:
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