Plant germplasm diversification strategies : a case study using Limonium : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science at Massey University, Palmerston North, New Zealand

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dc.confidentialEmbargo : No
dc.contributor.advisorFunnell, Keith
dc.contributor.authorCordoba-Sanchez, Juana
dc.date.accessioned2024-03-21T02:12:44Z
dc.date.available2024-03-21T02:12:44Z
dc.date.issued2024
dc.description.abstractLimonium Mill. was chosen for this research as it has an established market for ornamental use and faces significant challenges in breeding including access to germplasm with traits of interest, self-incompatibility in most species, and pollen/stigma dimorphism which limits the types of cross combinations that can be performed. In interspecific crosses, challenges can be the low hybridisation rate (<1%), and the sterility/low fertility of interspecific hybrids. To address these challenges, increase the germplasm diversity available, and speed the development of cultivars, two breeding strategies were evaluated in this research: ploidy manipulation and physically induced mutations. The main outcomes were: 1. Efficacy of those strategies in: • Increasing the ploidy levels of the selected genotypes and therefore the germplasm diversity for The New Zealand Institute for Plant & Food Research Ltd (PFR)’s germplasm bank. • Increasing the hybridisation rate in interspecific crosses. • Fertility restoration in interspecific hybrids 2. Development of plants with new characteristics or different ploidy levels (i.e., triploids, tetraploids, or even higher ploidy levels). 3. Breeding protocols for Limonium using N2O which could be further used in other plant breeding programmes. The use of Limonium for the development of a new breeding strategies for increasing genetic diversity has a direct impact on other breeding programmes i.e., food crops. In addition, the Limonium industry could have access to continued novelty, ensuring industry access to new cultivars would benefit New Zealand’s economy mainly through royalties.
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/69420
dc.publisherMassey Universityen
dc.rightsThe Authoren
dc.subjectLimoniumen
dc.subjectBreedingen
dc.subjectGeneticsen
dc.subjectVarietiesen
dc.subjectplant breedingen
dc.subjectpolyploidyen
dc.subjectnitrous oxideen
dc.subjectmutagenesisen
dc.subjectspindle disruptionen
dc.subject.anzsrc300803 Horticultural crop improvement (incl. selection and breeding)en
dc.subject.anzsrc310804 Plant developmental and reproductive biologyen
dc.titlePlant germplasm diversification strategies : a case study using Limonium : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Plant Science at Massey University, Palmerston North, New Zealand
thesis.degree.disciplinePlant Science
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.description.doctoral-citation-abridgedJuana Cordoba-Sanchez focused on the use of biotechnological tools for plant breeding. During her PhD studies, Mrs. Cordoba-Sanchez implemented breeding strategies to increase the germplasm diversity in the ornamental plant "Limonium". Mrs. Cordoba-Sanchez developed her PhD research in a collaborative effort between Massey University, Plant and Food Research, and MFAT. Her research’s results are valuable for New Zealand and Colombian horticultural industry.
thesis.description.doctoral-citation-longJuana Cordoba-Sanchez is a researcher in Plant Science focus on the use of biotechnological tools for plant breeding. During her PhD studies, Mrs. Cordoba-Sanchez implemented breeding strategies to increase the germplasm diversity in the ornamental and commercial plant: Limonium. Mrs. Cordoba-Sanchez developed her PhD research in a collaborative effort between Massey University, Plant and Food Research, and MFAT. Her research’s results are valuable for New Zealand and Colombian horticultural industry.
thesis.description.name-pronounciationHUA-NA COR-DO-BA SAN-CHEZ
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