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Tesi sul tema "Tetraploid"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Crockford, Andrew. "Deciphering tetraploid tolerance." Thesis, University College London (University of London), 2016. http://discovery.ucl.ac.uk/1475158/.

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Chromosomal instability and aneuploidy are common features of human malignancies, which fuel genetic heterogeneity and can lead to inaccurate diagnosis and treatment failure. Tetraploidy has been shown as an intermediate of aneuploidy and, thus, understanding the molecular mechanisms governing tetraploid tolerance is of great importance. A frequent tolerance mechanism observed in experimental systems and human tumours is loss of TP53, highlighting its central role in the tetraploidy checkpoint. However, despite this association, more than half of genome-doubled tumours are TP53 wild-type. The

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2

Muramoto, H. "Tetraploid Caducous Bract Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/203924.

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3

Tavakkol, Afshari Reza. "Variation in seed dormancy of tetraploid wheat." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ37916.pdf.

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4

Kuffer, Christian. "Proliferation and arrest of human tetraploid cells." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-182558.

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Durch Fehler entstandene tetraploide Zellen sind chromosomal instabil und können zu Zelltransformation führen. Die Beweise verdichten sich, dass die Propagation von tetraploiden Säugetierzellen durch einen p53-vermittelten Arrest eingeschränkt wird; jedoch ist weiterhin unklar, was die Ursache dieses p53-vermittelten Arrests ist. Um die Ursache des p53-vermittelten Arrests zu identifizieren, wurden individuelle Zellen mittels zeitraffender Mikroskopie in Echtzeit verfolgt. Neu entstandene tetraploide Zellen können einen Zellzyklus vollenden, aber die Mehrzahl der Zellen starb oder verharrte i

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5

Khan, Javed Ahmad. "Salinity effects on 4D recombinant tetraploid wheat genotypes." Thesis, Bangor University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321525.

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6

Diffoot, Nanette. "Corydoras aeneus: a diploid-tetraploid fish species complex." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101468.

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Corydoras aeneus is an armoured catfish found in the upper amazon regions of South America. It is a member of the family Callichthyidae. Studies done with this species of fish showed that C. aeneus is a tetraploid with a chromosome number of 132 (Scheel et al. , 1972). Dunham et al. (1980) reported 120 chromosomes. The C. aeneus used in this study were bought from direct importers. We had four samples of fishes supposedly coming from Brazil (Belem), Guyana, Peru and Trinidad. During our initial studies in an attempt to karyotype aeneus we came across individuals with a highly reduced chromosom

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7

Morgan, Christopher Henry. "Coordination of meiotic recombination in diploid and tetraploid arabidopsis." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/7092/.

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Homologous recombination is an integral part of meiosis and is essential for generating crossovers that ensure balanced segregation of homologous chromosomes and establish genetic variation within offspring. It is therefore exceedingly important that meiotic cells employ stringent control mechanisms to safeguard crossover formation. Work in yeast has indicated that the meiotic axis, a proteinaceous structure that tethers meiotic chromosomes into looped arrays, plays a crucial role in many aspects of homologous recombination, from double strand break formation to crossover interference. It has

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8

Schuck, Susan M., and Steven P. McLaughlin. "Flowering Phenology and Outcrossing in Tetraploid Grindelia camporum Green." University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/609102.

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Several reproductive processes of tetraploid Grindelia camporum were investigated. This plant is a potential resin crop for the southwestern United States. Field observations of 100 flower heads from unopened buds through 100% achene dispersal were made. It was found that individual flower heads are available for pollination for approximately 5 days but all disc florets are open for only 1 day. On average, achenes mature in 22 days and are dispersed 53 days after flowering. Fourteen-hundred hand-pollinations were also made on plants from 6 wild populations of G. camporum grown in a greenhouse

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9

Stone, Harriet. "Evolution and conservation of tetraploid Euphrasia L. in Britain." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7740.

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In the UK, nearly half of the plants short listed for high conservation priority in the UK Biodiversity Action Plan are found in taxonomically complex groups. It is thought that a shift from species- to process-based conservation strategies, aimed at conserving the processes that generate diversity as opposed to simply the end product of these dynamic interactions, may benefit these groups. One group for which this strategy has been proposed is tetraploid Euphrasia. The underlying taxonomic complexity in this group is hypothesised to arise via breeding systems, hybridisation and local ecotypic

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10

Acuna, Carlos A. "Bahiagrass germplasm reproductive characterization and breeding at the tetraploid level." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014399.

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11

Sangu, Nomah. "Quality of grain from crosses between Australian and tetraploid wheat varieties." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/19398.

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Wheat grain proteins and starch quality are commonly affected by abiotic stress conditions. In order to reduce the effects of climate change, there is need to select heat tolerant varieties usually grown in warmer regions. The University of Sydney’s Plant Breeding Institute is working to improve heat tolerance through novel crosses between commercial Australian wheat cultivars and the ancestral tetraploid, Emmer wheat (Triticum dicoccum), which has good heat tolerance. Several potential lines have been identified in the breeding programme, but there is need to determine their grain quality att

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12

Slotte, Tanja. "Evolution of Flowering Time in the Tetraploid Capsella bursa-pastoris (Brassicaceae)." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8311.

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13

Maddi, Satyanarayana. "DNA-based food authentication techniques : differentiation of tetraploid and hexaploid wheat." Thesis, Glasgow Caledonian University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517961.

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14

James, Roberta Margaret. "The contribution of tetraploid cells to mid-gestation mouse aggregation chimaeras." Thesis, University of Edinburgh, 1993. http://hdl.handle.net/1842/19873.

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Mouse aggregation chimaeras were used in this study to attempt to evaluate the developmental potential of tetraploid cells in the fetus and extraembryonic membranes of mid-gestation chimaeric conceptuses. Diploid͍diploid chimaeras were generated and analysed to provide a control and general baseline for the analysis of tetraploid͍diploid chimaeras. Relationships between compositions of tissues in the diploid͍diploid chimaeras were in agreement with those already established. Tetraploid embryos were produced by electrofusion, which facilitates the fusion of adjacent blastomeres following the ex

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15

Loehrlein, Marietta Margaret 1957. "Priming techniques and size characteristics of triploid and tetraploid watermelon seed." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276845.

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Triploid and tetraploid watermelon seed are visually indistinguishable, increasing costs to growers, who cannot market the low-quality 4N melons. Efforts were made to separate 3N and 4N seeds by thickness and weight. Means in both cases were not separable. Successful seed 'priming' would be beneficial to seedless watermelon growers. Seeds from the open-pollinated 4N x 2N cross were primed in solutions of distilled water, polyethylene glycol '8000' (PEG), and potassium nitrate (KNO₃), or left untreated; treated seeds were subsequently dried for either 1 or 7 days. Seeds were scored for germinat

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16

Silva, Paulo Minatel Gonella. "Revisão taxonômica do clado tetraploide-brasileiro de Drosera L. (Droseraceae)." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/41/41132/tde-03042013-090412/.

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O gênero Drosera (Droseraceae) compreende cerca de 200 espécies, 30 delas ocorrendo no Brasil. Nesta dissertação, é realizada a revisão taxonômica do clado tetraploide-brasileiro de Drosera, compreendendo 17 espécies e uma variedade. São apresentados e discutidos dados sobre morfologia, ecologia, distribuição geográfica e status de conservação para estas espécies, com mapas de distribuição, ilustrações, fotografias e tabelas comparativas. Os complexos D. graminifolia, D. Montana e D. villosa são discutidos nos capítulos 1, 2 e 3, respectivamente. Além disso, essas três espécies são recircunscr

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17

Kuffer, Christian [Verfasser], and Stefan [Akademischer Betreuer] Jentsch. "Proliferation and arrest of human tetraploid cells / Christian Kuffer. Betreuer: Stefan Jentsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1072038439/34.

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18

Schuck, Susan Marguerite 1957. "FLOWERING PHENOLOGY AND OUTCROSSING IN TETRAPLOID GRINDELIA CAMPORUM GREENE (GUMWEED, POLLINATION, ARIZONA)." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276715.

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19

Chen, Xinwei. "Molecular mapping of genes involved in carbohydrate metabolism and fluorescent AFLP-based tagging of QTL in tetraploid potato." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960383719.

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20

Saini, Jyoti. "Genomic Analysis of Domestication-Related Traits and Stem Rust Resistance in Tetraploid Wheat." Diss., North Dakota State University, 2017. https://hdl.handle.net/10365/27459.

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Modern durum and common wheat cultivars were developed from ancient wheat ancestors by natural and artificial selection of agronomic and domestication traits, which ultimatey decreased their genetic diversity and made them more susceptible to various biotic and abiotic stresses. At present, new sources of resistance need to be introgressed into future wheat cultivars to combat the effect of the disease stem rust caused by the biotrophic fungal pathogen Puccinia graminis f.sp. tritici (Pgt). In this dissertation, I first analyzed the domestication-related traits in a tetraploid recombinant inbr

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21

Ritter, Kate. "Fecundity of Triploid Eastern Oyster (Crassostrea virginica) as a Function of Tetraploid Lineage." W&M ScholarWorks, 2019. https://scholarworks.wm.edu/etd/1582642221.

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Rapid growth rate and partial sterility have made triploid eastern oysters (Crassostrea virginica) the most popular crop variety for the Virginia oyster aquaculture industry, typically comprising greater than 90% of larvae and juvenile sales. Triploid advantages, however, sometimes come with the disadvantage of higher mortality in late spring and early summer, dubbed “triploid mortality.” In recent years, farms up and down the East Coast, especially Maryland and south into the Gulf of Mexico have experienced triploid mortality. Some of the reports include observations of elevated triploid fecu

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22

Fogelström, Elsa. "Herbivores, pollinators and selection on flowering time in tetraploid and octoploid Cardamine pratensis." Thesis, Stockholms universitet, Institutionen för ekologi, miljö och botanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-88100.

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Repeated polyploidization events are thought to be among the most important causes of sympatric speciation throughout evolutionary time. Changes in phenology and trait expressions that arise in polyploids have been shown to affect plant interactions with insect herbivores and pollinators. If these interactions are changed, selection subsequent to the polyploidization event could contribute to further divergence, or increased similarity, of cytotypes. This study was conducted to investigate plant interactions with insect herbivores and pollinators and patterns of selection in tetraploid and oct

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23

Baack, Eric Jon. "An investigation of ecological factors affecting tetraploid speciation in snow buttercups (Ranunculus adoneus) (Ranunculaceae) /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2003. http://uclibs.org/PID/11984.

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24

SHERMAN, RICHARD ALAN. "CHROMOSOMAL INHERITANCE IN A BACKCROSS PROGRAM BETWEEN A HEXAPLOID COTTON LINE AND TETRAPLOID COTTON (CYTOGENETICS)." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183873.

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A breeding program was begun to transfer the caducous bract trait from the wild cotton diploid species Gossypium armourianum Kearney (D genome, 2n = 26) to the cultivated tetraploid species G. hirsutum (AD genomes, 2n = 4x = 52). The sterile triploids were then doubled with colchicine to obtain fertile hexaploid plants. These plants and their open pollinated progeny varied in their chromosome number from 73 to 82 chromosomes, the majority being the expected 78 chromosomes. Chromosome associations included bivalents, trivalents, quadrivalents, and hexavalents. The caducous bract trait varied fr

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25

Wall, Sarah. "The role of B chromosomes in the genetic system of a tetraploid grass (Koeleria cristata L.)." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237468.

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26

Skoneczka, Jeffrey Allen. "Inheritance and expression of Cry3Aa and PVY-O coat protein transgenes in diploid and tetraploid potato." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/10068.

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The potential benefits of plant genetic engineering for disease and pest resistance have been widely acknowledged in many studies, and although genetically modified crops are still encountering public wariness, these benefits warrant continued exploration. Because of its intrinsic economic benefits, the development of true potato seed (TPS) cropping systems has been instituted in many regions of the world. The incorporation of transgenic resistance could further the economic gain of farmers who are seeking ways to sustain their livelihood in the most efficient way possible. It is, however, lar

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27

Loehrlein, M. M., and D. T. Ray. "Techniques for Separating Tetraploid and Triploid Watermelon Seed and Effects of Some Priming Treatments on Germinaiton." College of Agriculture, University of Arizona (Tucson, AZ), 1988. http://hdl.handle.net/10150/214150.

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Seeds of the commercial cultivar for seedless watermelons, TriX313, were separated into groups based on thickness in one experiment and on weight in another. Number of triploids and tetraploids were recorded for each category. There were no significant differences in ploidy levels based on either weight or seed thickness. Seeds from this same cultivar were treated with priming solutions of polyethylene glycol (PEG 8000), KNO3, and distilled water for three lengths of time (1,3, or 6 days). The seed was subsequently air-dried for 1 or 7 days and then tested for germination and emergence.

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28

Liu, Chao-yin. "Variation and genetic control of prolamins in tetraploid wheats and their association with quality in durum wheat." Title page, contents and summary only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phl783.pdf.

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29

Whitebrook, J. "Heavy metal tolerance and the distribution in SW Britain of the diploid and tetraploid cytotypes of Leucanthemum vulgare Lam. (Compositae)." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372036.

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30

Ormanbekova, Danara <1987&gt. "Durum wheat gene annotation and selection signature detection in the tetraploid wheat germplasm from wild emmer to modern durum wheat." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8908/1/Tesi_Dottorato_Ormanbekova_Danara.pdf.

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The domestication of the wild emmer wheat nearly 10,000 years ago in the Fertile Crescent lead to the evolution of the free-threshing and easy to harvest tetraploid Triticum durum wheat. We annotated the gene models and assessed the gene expression pattern of a 10.45-gigabase assembly of durum wheat cultivar Svevo and predicted 66,559 high-confidence genes with 95.8% expression evidence. 75.0, 70.5 and 74.5% of high-confidence genes were expressed in grain, leaf and root tissues, respectively, of the 13 elite worldwide durum wheat varieties. Additionally, we annotated 1,487 loci associated wit

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31

Naran, D., P. H. Skelton, and Martin Herrer Villet. "Karyology of the redfin minnows, genus Pseudobarbus Smith, 1841 (Teleostei: Cyprinidae): one of the evolutionarily tetraploid lineages of South African barbines." African Zoology, 2006. http://hdl.handle.net/10962/d1008063.

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The karyotypes of six species of Pseudobarbus Smith, 1841, namely P. afer (Peters, 1864), P. asper (Boulenger, 1911), P. burchelli Smith, 1841, P. burgi (Boulenger, 1911), P. phlegethon (Barnard, 1938) and P. tenuis (Barnard, 1938), were examined by conventional Giemsa staining and described. All six karyotypes have 2n = 100 chromosomes, dominated by biarmed chromosomes, as does the only other member of the genus, P. quathlambae (Barnard, 1938). Sex-related intraspecific karyotype variation was not found. The shared chromosome numbers and general similarity of the karyotypes (FN = 186–192) pro

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32

De, Jesus Larry. "Effects of artificial polyploidy in transformed roots of Artemisia annua L." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0424103-155547.

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33

Sederberg, Maria C. "Physical Mapping of Ribosomal Genes in New World Members of the Genus Chenopodium Using Fluorescence in Situ Hybridization." BYU ScholarsArchive, 2008. https://scholarsarchive.byu.edu/etd/1629.

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The genus Chenopodium contains many economically important species in the New World, but is relatively understudied and poorly understood, especially in terms of evolutionary relationships. A better understanding of the structure of this genus could significantly help in breeding efforts on its cultivated members, notably the tetraploid C. quinoa and also certain varieties of C. berlandieri, also tetraploid. Of special concern is determining which diploid weed species are the most likely ancestors for C. quinoa, C. berlandieri, and the other tetraploid members of subsection Cellulata. The phyl

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34

Oliveira, Hugo Rafael Cardoso. "Archaeogenetics and the spread of agriculture in the Iberian Peninsula and Northwest Africa : a study of genetic variation within tetraploid and diploid wheats." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609794.

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35

Hennig, Anne [Verfasser], Andrea [Akademischer Betreuer] [Gutachter] Polle, and Reiner [Gutachter] Finkeldey. "Drought stress response of tetraploid hybrid aspen (Populus tremula L. x P. tremuloides Michx.) of protoplast fusion experiments) / Anne Hennig. Betreuer: Andrea Polle. Gutachter: Andrea Polle ; Reiner Finkeldey." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1102535656/34.

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36

Stewart, Alan V. "Plant breeding aspects of ryegrasses (Lolium sp.) infected with endophytic fungi." Phd thesis, University of Canterbury. Lincoln College, 1987. http://theses.lincoln.ac.nz/public/adt-NZLIU20071005.172250/.

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Some aspects of the presence of systemic endophytic fungi in agriculturally important New Zealand grasses were studied in relation to plant breeding. Seedling resistance to adult Argentine stem weevil feeding in perennial ryegrass, Italian ryegrass and tall fescue was found to be related to the presence of their respective Acremonium endophytes in the seed rather than to plant genetic resistance. In addition a study of perennial ryegrass revealed that this resistance was independent of endophyte viability. The seedling resistance conferred by the endophyte of Italian ryegrass was found to be b

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37

Rosche, Christoph [Verfasser], Isabell [Akademischer Betreuer] Hensen, Heinz [Akademischer Betreuer] Müller-Schärer, and Marie [Akademischer Betreuer] Jasieniuk. "The potential of polyploidy to counteract the negative consequences of demographic disequilibria in colonizing populations : empirical insights from diploid and tetraploid Centaurea stoebe / Christoph Rosche ; Isabell Hensen, Heinz Müller-Schärer, Marie Jasieniuk." Halle, 2016. http://d-nb.info/1117028291/34.

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Oliveira, Stéfanie Cristina de. "Poliploidização e calogênese in vitro de Jatropha curcas L." Universidade Federal do Espírito Santo, 2012. http://repositorio.ufes.br/handle/10/6567.

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Made available in DSpace on 2016-12-23T14:37:31Z (GMT). No. of bitstreams: 1 Stefanie Cristina Oliveira.pdf: 1100238 bytes, checksum: e4200efbe53a66bdaa4fc82fbfac51ed (MD5) Previous issue date: 2012-07-27<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>O uso de bioenergia tem sido apontado como uma estratégia para diminuição da utilização de combustíveis fósseis. Fundamentado nesse fato, muitos países, incluindo o Brasil, aumentaram os esforços para financiar pesquisas com espécies vegetais produtoras de biocombustíveis. Dentre essas espécies, Jatropha curcas L. destaca-se

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39

Zale, Peter J. "GERMPLASM COLLECTION, CHARACTERIZATION, AND ENHANCEMENT OF EASTERN PHLOX SPECIES." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417694536.

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40

BELOT, JEAN-MICHEL. "La tetraploidie en mosaique : a propos d'une observation." Lille 2, 1994. http://www.theses.fr/1994LIL2M002.

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41

Kuznetsova, Anastasia. "Transient tetraploidy as a route to chromosomal instability." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-168126.

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42

Nicholson, Joshua Miles. "The effects of chromosome number changes on mitotic fidelity and karyotype stability." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/52957.

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The correct number of chromosomes is important for the maintenance of healthy cells and organisms. Maintenance of a correct chromosome number depends on the accurate distribution of chromosomes to the daughter cells during cell division, and errors in chromosome segregation result in abnormal chromosome numbers, or aneuploidy. Aneuploidy is typically associated with deleterious effects on organismal and cellular fitness; however, aneuploidy has also been associated with enhanced cellular growth in certain contexts, such as cancer. Another type of deviation from the normal chromosome number c

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43

Darp, Revati A. "Insights into the Role of Oncogenic BRAF in Tetraploidy and Melanoma Initiation." eScholarship@UMMS, 2021. https://escholarship.umassmed.edu/gsbs_diss/1129.

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Melanoma, the most lethal form of skin cancer, arises from altered cells in the melanocyte lineage, but the mechanisms by which these cells progress to melanoma are unknown. To understand the early cellular events that contribute to melanoma formation, we examined melanocytes in melanoma-prone zebrafish strains expressing BRAFV600E, the most common oncogenic form of the BRAF kinase that is mutated in nearly 50% of human melanomas. We found that, unlike wild-type melanocytes, melanocytes in transgenic BRAFV600Eanimals were binucleate and tetraploid. Furthermore, melanocytes in p53-deficient tra

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44

Kuznetsova, Anastasia [Verfasser], and Stefan [Akademischer Betreuer] Jentsch. "Transient tetraploidy as a route to chromosomal instability / Anastasia Kuznetsova. Betreuer: Stefan Jentsch." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1049393279/34.

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Gouvea, Ediene Galdino de. "Construção de mapas genéticos para os genomas A, B e tetraploide de Arachis spp." reponame:Repositório Institucional da UnB, 2012. http://repositorio.unb.br/handle/10482/10698.

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Dissertação (mestrado)—Universidade de Brasília, Programa de Pós-Graduação em Botânica, 2012.<br>Submitted by Jaqueline Ferreira de Souza (jaquefs.braz@gmail.com) on 2012-06-14T11:03:51Z No. of bitstreams: 1 2012_EdieneGaldinodeGouvea.pdf: 1348445 bytes, checksum: eef908d13b7d1ad7bb9fd1bcfbf8ca24 (MD5)<br>Approved for entry into archive by Jaqueline Ferreira de Souza(jaquefs.braz@gmail.com) on 2012-06-14T11:04:04Z (GMT) No. of bitstreams: 1 2012_EdieneGaldinodeGouvea.pdf: 1348445 bytes, checksum: eef908d13b7d1ad7bb9fd1bcfbf8ca24 (MD5)<br>Made available in DSpace on 2012-06-14T11:04:04Z (GMT

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Grieger, Patrick. "Untersuchungen zur Züchtung variegater Pelargonium x zonale-Hybriden auf tetraploider Stufe." Doctoral thesis, Humboldt-Universität zu Berlin, Landwirtschaftlich-Gärtnerische Fakultät, 2007. http://dx.doi.org/10.18452/15673.

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Die vorliegende Arbeit befasst sich mit züchtungsmethodischen Untersuchungen zur Schaffung blattvariegater Pelargonium x zonale-Hybriden auf tetraploidem Leistungsstand. Basierend auf dem Wirkstoff Trifluralin konnte eine effektive Behandlungsvariante zur somatischen Polyploidisierung periklinalchimärischer Pelargonium x zonale-Klone etabliert werden. Unter Ausnutzung biparentaler Erbgänge wurden fünf ausgewählte Plasmotypen an das Leistungsniveau moderner Sortimente herangeführt. Daneben erbrachten Kreuzungen innerhalb der Sektion Ciconium hybridvariegate F1-Pflanzen. Die Möglichkeit der Ausn

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Burton, Tracy Lynn. "Relationships between diploids, tetraploids and their triploid hybrids, implications for evolution of polyploidy in plants." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0019/NQ55619.pdf.

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Carrillo, Maurício [UNESP]. "Indução à tetraploidia em tilápia nilótica Oreochromis niloticus utilizando-se choque térmico." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/144121.

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Made available in DSpace on 2016-09-27T13:40:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-06-02. Added 1 bitstream(s) on 2016-09-27T13:45:31Z : No. of bitstreams: 1 000224725.pdf: 617563 bytes, checksum: 40034ec7e8e2119ebc589d8e72abd28c (MD5)<br>A indução à tetraploidia em tilápia do Nilo foi realizada mediante a aplicação de choques térmicos quentes a uma temperatura de 41º C, utilizando-se três tempos pós-fertilização (P.F.). No 1º ensaio, utilizaram-se tempos de P.F. de 50, 55 e 60 minutos e duração de 2 e de 5 minutos e no 2º de 24, 27 e 30 minutos, com duração de 5 e de 8 m

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Carrillo, Maurício. "Indução à tetraploidia em tilápia nilótica Oreochromis niloticus utilizando-se choque térmico /." Jaboticabal, 2004. http://hdl.handle.net/11449/144121.

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Orientadora: Elizabeth Romagosa<br>Banca: Pedro Manoel Galetti<br>Banca: Teresa Cristina Ribeiro Dias Koberstein<br>Resumo: A indução à tetraploidia em tilápia do Nilo foi realizada mediante a aplicação de choques térmicos quentes a uma temperatura de 41º C, utilizando-se três tempos pós-fertilização (P.F.). No 1º ensaio, utilizaram-se tempos de P.F. de 50, 55 e 60 minutos e duração de 2 e de 5 minutos e no 2º de 24, 27 e 30 minutos, com duração de 5 e de 8 minutos. Para a coleta dos gametas, somente as fêmeas que apresentaram características secundárias de maturação foram induzidas artificial

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Bai, Jian. "Actin reduction by MsrB2 is a key component of the cytokinetic abscission checkpoint and prevents tetraploidy." Electronic Thesis or Diss., Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2019SORUS041.pdf.

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La dernière étape de la cytocinèse, appelée abscission, conduit à la séparation physique des deux cellules filles issues de la division cellulaire. En réponse à la présence anormale de chromatine dans le pont intercellulaire, un point de contrôle conservé au court de l’évolution appelé « abscission / NoCut checkpoint » retarde l’abscission et évite la formation de cellules binucléées en stabilisant le pont intercellulaire. Comment l’activation de ce point de contrôle permet de maintenir le pont intercellulaire pendant plusieurs heures reste mal connu mais pourrait reposer sur la présence de fi

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