DC FieldValueLanguage
dc.contributor.advisorHalbwirth, Heidrun-
dc.contributor.authorNitarska, Daria Agata-
dc.date.accessioned2021-04-15T08:06:17Z-
dc.date.issued2021-
dc.date.submitted2021-04-
dc.identifier.urihttps://doi.org/10.34726/hss.2021.37610-
dc.identifier.urihttp://hdl.handle.net/20.500.12708/17207-
dc.descriptionArbeit an der Bibliothek noch nicht eingelangt - Daten nicht geprüft-
dc.descriptionAbweichender Titel nach Übersetzung der Verfasserin/des Verfassers-
dc.descriptionKumulative Dissertation aus sechs Artikeln-
dc.description.abstractPoinsettia (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 orangeen
dc.format166 Seiten-
dc.languageEnglish-
dc.language.isoen-
dc.subjectpoinsettiaen
dc.subjectfloweren
dc.subjectpigment anthocyaninen
dc.subjectblueen
dc.subjectorangeen
dc.titleBreeding poinsettias with novel bract colouration by genome editingen
dc.title.alternativeZüchtung von Weihnachtssternen mit neuer Blütenfarbe mittels Genome editingde
dc.typeThesisen
dc.typeHochschulschriftde
dc.identifier.doi10.34726/hss.2021.37610-
dc.publisher.placeWien-
tuw.thesisinformationTechnische Universität Wien-
tuw.publication.orgunitE166 - Institut für Verfahrenstechnik, Umwelttechnik und technische Biowissenschaften-
dc.type.qualificationlevelDoctoral-
dc.identifier.libraryidAC16186108-
dc.description.numberOfPages166-
dc.thesistypeDissertationde
dc.thesistypeDissertationen
item.openairetypeThesis-
item.openairetypeHochschulschrift-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextwith Fulltext-
item.cerifentitytypePublications-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.languageiso639-1en-
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