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Perspectives of Christmas rose (Helleborus niger L.) genetic improvement
Andrej Šušek, 2016, original scientific article

Abstract: The Christmas rose is becoming a very important ornamental plant on the market. It is relatively new to intensive production technologies. The number of genetically-improved varieties on the market is limited, and many of the old cultivars are no longer available because of slow and economically unfeasible vegetative propagation. In the future, its genetic improvement will probably become inevitable. New cultivars will have to satisfy the specific requirements of the market and producers as well as strict environmental policy. In order to obtain new cultivars it will be necessary to evaluate the existing germplasm and apply an adequate genetic breeding approach. There are seven main possibilities of creating new varieties: the use of natural variation associated with seed germination, population approach based on recurrent selection, individual selection based on specific genetic combinations, the creation of inbred lines and the formation of hybrids, interspecific hybridisation, mutagenesis and genetic engineering. Molecular markers can be very helpful during the breeding process. They can be used in order to study genetic relationships amongst populations, ecotypes, varieties, and hybrids.
Keywords: Christmas rose, Helleborus niger, cultivars, breeding perspectives
Published: 14.11.2017; Views: 710; Downloads: 289
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Morphological descriptors of Christmas rose (Helleborus niger L.)
Andrej Šušek, 2008, original scientific article

Abstract: The Christmas rose (Helleborus niger L.) is becoming an important ornamental plant. in the future, a systematic genetic improvement will probably become inevitable and therefore the characterisation of the naturally grown populations and the accessions within germplasm collections will be extremely important for the breeders. We followed the idea that characterisation of genetic materials has to involve highly heritable morphological traits which are important for the selection and are easy for the determination. the study is based on 5-year long observations of the Slovenian and Croatian naturally grown populations and gerplasm collections. The papers describes 72 morphological traits that appear to be at last partly genetically controlled and can be used as descritors of Christmas rose genotypes.
Keywords: Christmas rose, Helleborus niger, ornamental plants, morphological descriptors
Published: 10.07.2015; Views: 763; Downloads: 20
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