Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"interspecific hybrids"”.
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Genomic analysis of Saccharum species and interspecific hybrids
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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The development and evolution of Saccharomyces interspecific hybrids for improved, industry relevant, phenotypes
… proof of concept (ie can laboratory generated interspecific yeast strains be developed for industrial application) through to realisation of the potential of novel interspecific wine yeast for improved outputs in the winery. A competitive market requires winemakers to not only be aware of …
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Introgression of genes from rape to wild turnip
… for gene introgression from rape to wild turnip. Interspecific hybrids were easily generated using wild turnip as the maternal plant, with some minor differences between wild turnip populations. The frequency of successful hybridisation between the two species was higher on the lower raceme. …
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Isolation in Tragopogon (Compositae)
… to determine the role and significance of interspecific hybridization in speciation within the genus. Field observations indicate the common occurrence of interspecific hybrids between T. pratensis, a yellow-flowered species and T. porrifolius, a species with purple flowers. The occurrence …
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Derivation of interspecific Solanum hybrid genotypes with resistance to Colorado potato beetle (Leptinotarsa decemlineata Say)
… Solanum chacoense (chc) - S. phureja (phu) hybrids and the regeneration potential of anther-derived monoploids was evaluated. In vivo evaluation of interspecific hybrids was also performed. Three hybrids were anther cultured to observe the effects of reduced nitrogen source on androgenesis. …
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The relationship between two species of fur seals Arctocephalus Tropicalis (Gray) and A. Gazella (Peters) on Marion Island
… hybridizing. Adult males of both species and the interspecific hybrids can be distinguished using univariate and multivariate analyses of cranial measurements. The two species differed in the electrophoretic mobility of the serum protein, transferrin. The extent of hybridization appears to be …
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Evolutionary studies in the genus Cucumis
… (2) their self-compatibility and intra- and interspecific cross-compatibility levels, (3) their basic chromosome number and meiotic chromosome behavior and that of their interspecific hybrids, (4) the variation, inheritance and geographical distribution of their electrophoretically detectable …
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Towards the exploitation of the American hazelnut (Corylus americana)
… of EFB resistance and climatic adaptation. Interspecific hybrids (C. americana × C. avellana) have been explored for nearly a century as a means to combine EFB resistance with wider adaptability and larger nuts. While significant progress was made in the past, the genetic diversity of the …
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Unlocking the genetic diversity of the undomesticated rice relative Oryza longistaminata
… programs is a breeding barrier which complicates interspecific hybridization with O. sativa, as well as the expense and difficulty of identifying which O. longistaminata accessions carrying useful genes. Breeding programs also rely on thorough ex-situ conservation of O. longistaminata, which …
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Ontogenic Resistance To Uncinula Necator In Developing Berries Of Grapevine (Vitis Spp.): Using Germplasm Diversity To Study The Mechanism
… this goal. A screen of wild Vitis spp. and interspecific hybrids was conducted to identify and describe phenotypic variation. This project was successful in both expanding our understanding of the population dynamics of ontogenic resistance and in identifying genotypes with suitable …
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Studies of androgenic processes in diploid potato
… diploid potato (2n=2x=24) were studied in three interspecific hybrids. Five incubation temperature treatments were examined. Temperature shock (35°C) during the first 12 h of anther culture and elevated incubation temperature (30°C 16h/20°C 8h) (hereafter 35°C-30°C/20°C) enhanced androgenic …
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Genetic analysis of androgenetic competence and plants regenerated from callus culture of diploid potato species
… was studied in 10 diploid potato species hybrids and 16 backcross progeny. Ten hybrid families including three reciprocals were generated between competent clones of S. phureja and incompetent clones of S. berthaultii, S. microdontum and S. phureja. The F₁ hybrid families segregated for …
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The decline of Fowler's Toad (Bufo fowleri) in southern Louisiana: molecular genetics, field experiments and landscape studies
… changes, a molecular genetic study to identify interspecific hybrids and their potential effects on the parental species, and an experimental ecology study to look at the effects of competition and predation on the two species. The results of the landscape level analyses of species' …
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The complete plastid genome sequence of Passiflora cincinnata: genome rearrangements, massive plastid gene losses and implications to genome-plastome incompatibility
… of nucleus-plastome incompatibility, observed in interspecific hybrids of Passiflora, has remained obscure due to the lack of plastid sequences in the database. In the context, starting to fill these gaps and to enable the characterization of plastid genetic markers and the construction of vectors …
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Apareamiento intergenómico y formación de polen no reducido en híbridos trigo x aegilops
… hibridos. Abstract 4 ABSTRACT The occurrence of interspecific hybridization is not the only requirement for gene transfer from a crop to a wild relative. Both crop and wild chromosomes must pair and recombine during meiosis and recombined sequences must be incorporated into the wild genome by …
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A comparative analysis of the metabolomes of different berry tissues between Vitis vinifera and wild American Vitis species, supported by a computer-assisted identification strategy
… Vitis vinifera grape varieties, tens of grape interspecific hybrids and few wild grape species analyzed per four years; all included in a single experiment. Starting from this data handling, I designed specific experiments to confirm the hypotheses generated from the observation of the data, to …
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Genome-wide diversity assessment for genetic resource management of Eucalyptus dunnii, E. grandis, E. nitens and E. urophylla
… is globally important as several species and interspecific hybrids are used in commercial hardwood forestry. More than 95% of the current Eucalyptus plantation stock comprise just nine species and their hybrids in the subgenus Symphyomyrtus. As such, the distribution of genetic variation in …
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The genetics of species differences within the genus Nasonia ASHMEAD 1904 (Hymenoptera: Pteromalidae)
… isolation, i.e. they prevent the formation of hybrids, whereas postzygotic isolation occurs when hybrids experience a fitness reduction. The parasitic wasp genus Nasonia represents an appropriate model system to investigate the genetics of species differences as well as the genetics of …
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Molecular-cytogenetic analysis of repetitive sequences in genomes of Beta species and hybrids
… in wild and cultivated beet species and in their hybrids. New repetitive sequences were isolated from the B. procumbens genome. The AluI restriction satellite repeats pAp11 are 229-246 bp long and form subfamilies. The satellite is amplified in the section Procumbentes, but also found in distantly …
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