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Showing 1 to 12 of 12 for “"allopolyploid"”.
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Determining the Fate of Hybridized Genomes in the Allopolyploid Brassica napus
… speciation of the majority of flowering plants. Allopolyploid forms through interspecific hybridization and whole genome duplication. While allopolyploids may display increased vigor relative to their progenitors, they can also face challenges to fertility following hybridization. Genetic changes …
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Natural hybridization between two allopolyploid wheatgrasses Elytrigia intermedia and E.repens (Poaceae, Triticeae)
Cí|epnice Disertačnípráce je součástíširšíhoprojektu, kteý hodnotí hybridizaci v komplexu druhi Triticum aestivum-Elytrigia intermedia-E. repens. Tento komplex představujereálný modeloý systémplodina_plevel (planý příbumý) s možným genoým tokem. Cílem projekfu je detekovat a případně ohodnotit …
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The Role of Carotenoid Cleavage Dioxygenase 4 in Flower Color of the Allopolyploid Brassica napus
<p>Allopolyploids are formed by interspecific hybridization and whole genome duplication, with the resulting organism contains multiple distinct subgenomes in one nucleus. Subgenomic interactions result in massive genetic and epigenetic reconstruction, contributing to variable phenotypic traits …
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Molecular evolution following allopolyploidization in Gossypium
… that deleterious mutations accumulate faster in allopolyploid than in diploid cotton species due to the masking effect of duplicated genes with shared functions, and discuss the possible implications of this finding for several other aspects of polyploid genome evolution. I introduce the concept …
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Polyploidy inference across time scales in the charismatic carnivorous plant genus Drosera L. (Droseraceae, Caryophyllales)
… de novo assembly, I found that D. anglica is of allopolyploid origin from D. rotundifolia (paternal) and D. linearis (maternal). Findings in Chapter 3 supported five polyploidy events in Drosera and extensive gene tree discordance. The three research topics together suggested that using multiple …
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Evolutionary dynamics of mechanisms that affect genome size in the cotton genus (Gossypium)
… genomes: the two co-resident genomes of the allopolyploid G. hirsutum and its model diploid progenitors, G. arboreum and G. raimondii. Two BAC-sized regions of the cotton genome were sequenced and analyzed with respect to the mechanisms that alter genome size, and rates of sequence change …
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Multiple origins of 'Senecio cambrensis' Rosser and related evolutionary studies of British 'Senecio'
… thesis was the discovery that the newly arisen allopolyploid species, S. cambrensis Rosser, has originated on more than one occasion in Britain. A survey of isozyme variation for acid phosphatase (ACP) and a-esterase (a-EST) in S. cambrensis (2n = 60) and its putative parents, the Oxford …
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Clarification of basal relationships in Rubus (Rosaceae) and the origin of Rubus chamaemorus
… suggest that R. chamaemorus may be an ancient allopolyploid. The phylogenetic position of Dalibarda repens relative to Rubus cannot be resolved by existing GBSSI-1 data.
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Molecular Systematics of <i>Isoëtes</i> (Isoëtaceae) in Eastern North America
… through allopatric speciation, and fertile allopolyploids derived from whole genome duplication following primary hybridization. Phylogenies inferred from whole chloroplast genome DNA sequences using maximum-likelihood and Bayesian inference were fully resolved with high support. Ancestral …
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Biosystematics of the annual species of the Mimulus guttatus species complex in British Columbia, Canada
… of M. queue indicated that it is likely an allopolyploid. Whether the B.C. and Oregon populations are directly related or independently derived could not be determined from the present data. More collecting is required to determine the geographic distribution of M. queue and to shed light on …
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Role of subfunctionalized MYB paralogs in the evolution of pigmentation patterning in Clarkia
… for elucidating the putative parents for the 10 allopolyploid species. Then I used this species tree and whole petal transcriptomes from a majority of Clarkia species and six outgroup species in the Onagraceae family to explore the origin and role of these duplicated MYBs. Presence of these MYB …
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Linkage mapping in prairie cordgrass (Spartina pectinata Link) using genotyping-by-sequencing markers
Global climate change from anthropogenic carbon emissions can be mitigated through the development of bioenergy systems. Bioenergy feedstocks tolerant of marginal land can reduce the tension between bioenergy production and food production. Prairie cordgrass (Spartina pectinata Link) is tolerant of …