<div class="csl-bib-body">
<div class="csl-entry">Nitarska, D. (2021). <i>Breeding poinsettias with novel bract colouration by genome editing</i> [Dissertation, Technische Universität Wien]. reposiTUm. https://doi.org/10.34726/hss.2021.37610</div>
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dc.identifier.uri
https://doi.org/10.34726/hss.2021.37610
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/17207
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dc.description
Abweichender Titel nach Übersetzung der Verfasserin/des Verfassers
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dc.description
Kumulative Dissertation aus fünf Artikeln
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dc.description.abstract
Poinsettia (Euphorbia pulcherrima) commonly shows red bract colouration caused by theaccumulation of cyanidin-type anthocyanins. Orange-red cultivars, which accumulatepelargonidin-type anthocyanins occur rarely, whereas blue poinsettias are not naturally presentdue to the lack of delphinidin formation. Breeding is an arduous process, and a lot of effort isnecessary to obtain plants with desired traits. Some phenotypes are not possible to achieve byclassical breeding approaches due to limitations in the genetic background of the plants.Molecular breeding techniques like genome editing can help to overcome those obstacles andobtain novel poinsettia varieties with orange or blue colour in a fast and efficient way. Thecolour of anthocyanin pigments depends on the B-ring hydroxylation pattern and ranges fromorange pelargonidin (one hydroxyl group), dark red to pink cyanidin (two hydroxyl groups)and blue to violet delphinidin (three hydroxyl groups). Two factors are crucial for theestablishment of the B-ring hydroxylation pattern. First, the presence or absence of flavonoid3’-hydroxylase (F3’H) and flavonoid 3’5’-hydroxylase (F3’5’H) activity, and second, thesubstrate specificity of dihydroflavonol 4-reductase (DFR), which provides importantintermediates in the formation of anthocyanins. In this thesis, the physiological background ofcolour formation was studied in petunia as a model plant and in red, and orange poinsettiacultivars. Based on this, a strategy for molecular breeding of orange and blue poinsettia wasestablished. The investigations on the molecular background of pigment formation in orange
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
poinsettia
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dc.subject
flower
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dc.subject
pigment anthocyanin
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dc.subject
blue
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dc.subject
orange
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dc.title
Breeding poinsettias with novel bract colouration by genome editing
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dc.title.alternative
Züchtung von Weihnachtssternen mit neuer Blütenfarbe mittels Genome editing
de
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.identifier.doi
10.34726/hss.2021.37610
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dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Daria Nitarska
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dc.publisher.place
Wien
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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tuw.publication.orgunit
E166 - Institut für Verfahrenstechnik, Umwelttechnik und technische Biowissenschaften
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dc.type.qualificationlevel
Doctoral
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dc.identifier.libraryid
AC16186108
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dc.description.numberOfPages
166
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dc.thesistype
Dissertation
de
dc.thesistype
Dissertation
en
tuw.author.orcid
0000-0003-3079-2291
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dc.rights.identifier
In Copyright
en
dc.rights.identifier
Urheberrechtsschutz
de
tuw.advisor.staffStatus
staff
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tuw.advisor.orcid
0000-0001-9059-5850
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item.languageiso639-1
en
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item.openairetype
doctoral thesis
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item.grantfulltext
open
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item.fulltext
with Fulltext
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item.cerifentitytype
Publications
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item.mimetype
application/pdf
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item.openairecristype
http://purl.org/coar/resource_type/c_db06
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item.openaccessfulltext
Open Access
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crisitem.author.dept
E166-06-2 - Forschungsgruppe Phytochemie und Pflanzenbiochemie
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crisitem.author.parentorg
E166-06 - Forschungsbereich Bioressourcen und Pflanzenwissenschaften