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 91 for “"ploidy"”.
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Ploidy in Trifolium ambiguum
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Farm Crops, 1959
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DNA ploidy analysis of primary lymphoma of bone from mandible and maxilla
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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Survivorship of ploidy-variable unisexual <i>ambystoma</i> aalamanders across developmental stages
<p>Unisexual <em>Ambystoma</em> produce ploidy-variable offspring that differ in survivorship to adulthood. These populations reproduce through kleptogenesis, persisting by stealing genetic material from males of compatible bisexual <em>Ambystoma</em> species (e.g., Jefferson's Salamander <em>A. …
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Ploidy and Ecophysiology analysis of the Arenaria ciliata L. complex (Caryophyllaceae) in Europe
… of 3 species with overlapping morphological and ploidy identities. The group has a wide but fragmented distribution across Europe, extending from high habitats in the mountains of central Europe and Iberia to sea-level habitats in the arctic. Because of their cold habitat distribution, they are …
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Correlation between histological grade and ploidy status in potentially malignant disorders of the oral mucosa
No abstract available. Copyright
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Effect of Ploidy Elevation, Copy Number and Parent-Of-Origin on Transgene Expression in Potato
… in potato, although studies have associated ploidy elevation with transgene silencing in plants such as Arabidopsis thaliana. In the present study, potato was transformed with two different transgenes, cry3Aa and PVYo cp, and transgene expression was analyzed through 4x-2x hybridization. …
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Ploidy Level Effects and Effects of Inbreeding on Single and Double Cross Performance in Autotetraploid Maize
A potential use of induced polyploidy in maize (Zea mays L.) is to capitalize on the direct consequences of chromosome duplication i.e. larger cell and plant parts. Theory suggests that in autotetraploids performance of double crosses (DC) is expected to exceed that of single crosses (SC) if the SC …
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Investigation of the relevance of DNA ploidy and proliferative fraction analysis in the subclassification of follicular lymphomas
This document only includes an excerpt of the corresponding thesis or dissertation. To request a digital scan of the full text, please contact the Ruth Lilly Medical Library's Interlibrary Loan Department (rlmlill@iu.edu).
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The influence of ploidy level on the hearing sensitivity of the sister species Hyla chrysoscelis and Hyla versicolor
<p>Polyploidy is the presence of more than two sets of chromosomes. Polyploidy can be fatal, but when tolerated it always results in increased cell size. Polyploid vertebrates are not larger than their diploid counterparts, despite having larger cells, due to cellular rearrangements. An anuran …
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Analysis of anther-derived plants of Solanum phureja: variation in ploidy, photosynthetic efficiency and structure of the nuclear genome
… plants of Solanum phureja regarding their: 1) ploidy level and morphology, 2) net photosynthesis and its biochemical components, and 3) nuclear genomic structure, particularly with regard ·to the amplification of rRNA genes as influenced by the anther-culture process. Based on the analysis of …
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Intraspecific plant polyploidy effects on goldenrod insect herbivores
<p>Polyploidy is a dynamic process underlying a significant component of angiosperm diversity. This thesis research explores ploidy level as a source of genetic variability within a plant species, Solidago altissima L. (Asteraceae) and how this variation influences its herbivore community. More …
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Increased levels of ploidy in A. texanum-dependent A. platineum (JJL) populations in eastern Illinois: conservation implications for the state endangered species
… instead and has had persistent levels of tetraploidy. This has been shown to be a result of the fertilization of unreduced A. platinuem ova by Ambystoma texanum sperm (JJLTx). More recently at least 6 other A. texanum-dependent A. platineum populations have been discovered in Vermillion and …
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Effect of Lolium perenne L. ploidy, Trifolium repens L. inclusion and cow breed on the productivity and profitability of pasture-based, spring-milk systems
… 1,954 kg/ha) and MS (+ 156 kg/ha) yields per ha. Ploidy did not affect the white clover content of the swards, with swards having an average white clover content of 23% over the four years. The PRG-white clover swards also produced an additional 1,205 kg DM/ha herbage on average over the four year …
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Statistical Methods For Resolving Intratumor Heterogeneity With Single-Cell Dna Sequencing
… proven computational methods for determining the ploidy of a cell, a necessary step in the determination of copy number. In this work, software for calculating probabilities from a multinomial distribution was written to estimate the number of cells that must be sequenced (chapter 2). Two new …
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Morphological and ecological divergence in the hybridogenic fish complex Squalius alburnoides
Polyploidy in animals is rare and often associated with asexual reproduction in all-female lineages. Although some authors believe these lineages to be evolutionary dead ends there is increasing evidence that some species can adapt efficiently and ultimately evolve into a new sexually reproducing …
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Weed versus wildflower : mating system ecology in a Taraxacum native-exotic contact zone
… plant species often exhibit differences in ploidy level, mode of reproduction, and traits related to reproduction. Differences in ploidy levels are often associated with mating system differentiation, especially in genera capable of clonal seed production through apomixis, which are derived …
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Investigation of the role of polyploidization in glial cells during the development of the drosophila nervous system
… SPG cells are capable of achieving higher ploidy and cell area values than endocycling cells and are essential to the integrity of the BBB. Strikingly, we find that endocycling SPG within the ventral nerve cord retain the ability to undergo endomitosis when the Notch signaling pathway or …
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How much DNA is too much?
… that cell growth accompanies increased ploidy across this range, and that physical determinants alleviating and exacerbating cell surface stress increase and decrease the limit to viable ploidy, respectively. I also identify gene expression changes characteristic of whole genome …
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