| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Search the digital library catalog Help

Query: search in
search in
search in
search in
* old and bologna study programme

Options:
  Reset


1 - 10 / 10
First pagePrevious page1Next pageLast page
1.
Vrednotenje sort črnega teloha, selekcioniranih za gojenje v loncih
Aleks Raščan, 2019, bachelor thesis/paper

Abstract: Raziskava v diplomskem delu je bila opravljena v letih 2016 in 2017 na treh sortah črnega teloha (Helleborus niger): ´Praecox´, ´Happy day´ in ´Happy day Royal´. Namen diplomskega dela je bil proučiti morfološke lastnosti teh treh sort, ki so selekcionirane za pridelavo v loncih. Rastline so bile posajene v substrat Klasmann Tonsubstrat in postavljene na plato za gojenje rastlin v loncih v delu, ki je bil dodatno senčen s senčilnimi mrežami. Ugotovili smo, da med proučevanimi sortami črnega teloha obstajajo statistično značilne razlike v morfoloških lastnostih. Povprečno število razvitih listov proučevanih sort se je statistično značilno razlikovalo le ob prvi in drugi meritvi, ob zadnji meritvi pa je bilo število listov enakomerno. Sorta ´Happy day Royal´ je razvila značilno večje liste in tvorila statistično značilno več cvetov v primerjavi s sortama ´Praecox´ in ´Happy day´.
Keywords: teloh, Helleborus niger, sorte, morfološke lastnosti
Published: 22.02.2019; Views: 485; Downloads: 39
.pdf Full text (1,22 MB)

2.
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
.pdf Full text (468,79 KB)
This document has many files! More...

3.
Pollinators of Helleborus niger in Slovenian naturally occuring populations
Andrej Šušek, Anton Ivančič, 2006, original scientific article

Abstract: The study is based on documentation and analysis of the major visitors and pollinators of the Christmas rose (Helleborus niger L.) flowers in Slovenian naturally occurring populations. The emphasis was put on 5 groups of insects: bees, bumblebees, large flies, small dipterous flies and pollinators of minor importance. Systematic observations took place in March 2003, at two different locations: on the valley of Bohinjska Bela and on the Peca Mountain. The first location was not far from a rural area, while the second one was in an isolated area, completely in the wild. The analysis of insect activity showed that there were obvious differences in frequency of visits among the insect groups investigated, locations and time of day. In the population of Bohinjska Bela, bees were the most important pollinators, with the highest activity occurred between 10 a.m. and 11 a.m. In the isolated population in Peca the most frequent visitors were small dipterous flies. The study suggests that the Christmas rose is probably an entomophylous (the most important pollinators are insects, such as bees and flies) and predominantly cross-pollinating species. The entomophylous nature appears to be closely associated with the specific botanic characteristics of flowers. Another pollinating agent is probably wind.
Keywords: chrismas rose, helleborus niger, wild populations, pollinators, open pollination, cross pollination, population dynamics, plant population
Published: 13.07.2017; Views: 703; Downloads: 57
.pdf Full text (224,24 KB)
This document has many files! More...

4.
5.
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: 761; Downloads: 20
URL Link to full text

6.
7.
8.
9.
Umetno opraševanje in viabilnost peloda črnega teloha (Helleborus niger L.)
ŠTEFKA GOLEC, 2010, undergraduate thesis

Abstract: Raziskava je bila narejena na črnem telohu (Helleborus niger L.) v letih 2006 in 2007. V naravni populaciji v kraju Doblatina smo proučevali možnost samooprašitve teloha in kaljivost semen samooprašenih rastlin. Analizirali smo semenitev samooprašenih in hibridiziranih rastlin. Z metodo barvanja z acetokarminom smo proučevali vitalnosti peloda glede na dolžino skladiščenja pri temperaturi -9 oC. Za analizo samooprašnosti smo v naravni populaciji izolirali 41 matičnih rastlin. Rastline, ki smo jih ročno samoopraševali, so semenile. Povprečna kaljivost je bila 9,17 %. Največje število semen je bilo 105, najmanjše pa 2 semeni na posamezno obravnavano rastlino. Pri primerjavi semenitve rastlin je bilo ugotovljeno, da hibridizirane rastline tvorijo povprečno težja semena kot samooprašene rastline. Z analizo je bilo ugotovljeno, da obstajajo statistično značilne razlike v viabilnosti peloda, ki smo ga različno dolgo skladiščili.
Keywords: opraševanje, semenitev, vznik, viabilnost peloda, črni teloh, Helleborus niger
Published: 13.10.2010; Views: 2606; Downloads: 148
.pdf Full text (1,61 MB)

10.
Analiza opraševalnih odnosov in kalitve peloda črnega teloha (Helleborus niger L.)
Davor Bauman, 2009, undergraduate thesis

Abstract: Raziskava je bila opravljena na črnem telohu (Helleborus niger L.) in obsega v prvem delu dokumentiranje in analizo glavnih opraševalcev črnega teloha v naravni populaciji v drugem pa analizo kalivosti peloda. Osredotočili smo se na pet skupin insektov: čebele, čmrlje in ose, velike dvokrilne insekte (muhe), majhne dvokrilne insekte in druge opraševalce, ki so majhnega pomena. Sistematično opazovanje je potekalo marca 2009 v Žičah pri Slovenskih Konjicah. Analize opraševanja povezane z aktivnostjo žuželk nakazujejo, da obstajajo očitne razlike v pogostosti obiska med proučevanimi skupinami žuželk in dnevnim časom. Najpogostejši obiskovalci so bile majhne mušice. Opazovanja kažejo, da je črni teloh verjetno prevladujoča tujeprašna, entomofilna vrsta. Pri analizi živosti peloda smo ugotavljali optimalne pogoje skladiščenja. Živost peloda smo vrednotili s tehniko in vitro kalitve. Pelod je statistično značilno bolje kalil na gojišču z višjim pH in nižjo koncentracijo sladkorja. Živost peloda se je ohranila tudi po 5 mesecih, če smo ga skladiščili v zamrzovalniku pri -75ºC.
Keywords: črni teloh, Helleborus niger, naravne populacije, opraševanje, živost peloda, in vitro kalitev
Published: 16.10.2009; Views: 2347; Downloads: 163
.pdf Full text (2,14 MB)

Search done in 0.31 sec.
Back to top
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica