Evaluation of anther-derived, inbred, and hybrid populations of Streptocarpus X hybridus Voss

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dc.contributor.authorWolff, David W.en
dc.contributor.departmentHorticultureen
dc.date.accessioned2014-03-14T21:49:47Zen
dc.date.adate2013-11-15en
dc.date.available2014-03-14T21:49:47Zen
dc.date.issued1985-08-05en
dc.date.rdate2013-11-15en
dc.date.sdate2013-11-15en
dc.description.abstractThe potential of inbreeding and selective hybridization, along with anther culture, for increasing homogeneity with 2 early flowering cultivars of Streptocarpus X hybridus was examined. A 'Concorde' and 'Mixed Nymph' genotype expressed inbreeding depression within 2 generations, characterized by a reduction in corolla, leaf, and peduncle size, as well as an increase in floral deformities (flower part fusions). Inbred populations contained individuals which resembled the parent cultivars for several morphological traits. Such could be selected by cluster analysis of important traits, for the development of inbreeding depression resistant lines for hybrid production of more uniform, seed-propagated Streptocorpus cultivars. Reciprocal differences were observed among hybrids of first-generation inbreds, suggesting that female parent selection is critical for certain ornamental traits such as corolla size and peduncle length. Plants were regenerated from anther-derived callus of ‘Concorde’ and 'Mixed Nymph'. The plants were found to be of somatic cell origin, but exhibited somaclonal variation for overall morphology. Variation for leaf variegation and morphology, days to flowering, flowers per peduncle, peduncle length and leaf area were observed among progeny of anther-derived plants, indicating that heritable somaclonal variation in Streptocarpus may be exploited for increased genetic diversity for cultivar development.en
dc.description.degreeMaster of Scienceen
dc.format.extentx, 67 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11152013-040406en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11152013-040406/en
dc.identifier.urihttp://hdl.handle.net/10919/45740en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1985.W643.pdfen
dc.relation.isformatofOCLC# 13041424en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1985.W643en
dc.subject.lcshGesneriaceae -- Breedingen
dc.subject.lcshGesneriaceae -- Morphologyen
dc.titleEvaluation of anther-derived, inbred, and hybrid populations of Streptocarpus X hybridus Vossen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineHorticultureen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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