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Dissertations / Theses on the topic 'Haploid'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Nettelblad, Jessica. "Haploid Selection in Animals." Thesis, Uppsala universitet, Evolutionsbiologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-362821.

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Haploid selection in animal sperm is a somewhat controversial topic, but recentevidence might shed experimental light on the matter. This thesis investigates thepossibility to detect any genetic selection in an artificial setting for zebrafish spermfrom a single individual. I analyse pooled data acquired from whole-genomesequencing for two distinct groups of short- and long-lived sperm, trying to identifyshifts in allele frequencies. I augment this by designing an accurate computersimulation of selection, that manipulates selection strength and takes biologicalaspects like linkage and sequence

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2

Cardoso, Jean Carlos. "Cultura de anteras e partenogênese in situ e in vitro de genótipos de laranja doce (Citrus sinensis Osbeck.)." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-24092012-171957/.

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A produção de linhagens completamente homozigotas em programas de melhoramento genético de citros é difícil e demorada, e a obtenção de plantas duplo-haplóides pode ser utilizada para aumentar a eficiência de programas de melhoramento. No entanto, muitos são os fatores associados ao sucesso na regeneração de plantas haploides e/ou duplo-haplóides. Os objetivos deste projeto foram a obtenção de plantas haploides e/ou duplo-haplóides de laranja doce (Citrus sinensis) utilizando as técnicas de cultura de anteras e partenogênese in situ e in vitro, que consistem na obtenção e regeneração de embriõ

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3

Walker, Ryan Lee. "Evaluation of short-day onion doubled haploid lines." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1185.

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4

Shanks, Morag E. "Mutational dynamics of a haploid Y-specific minisatellite." Thesis, University of Leicester, 2006. http://hdl.handle.net/2381/30368.

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MSY1 is the only hypervariable minisatellite on the human Y chromosome. Arrays contain 22-114 AT-rich repeat units of 25bp in length, of which eighteen different sequence-variant types have been identified. MSY1 maintains >99% virtual heterozygosity despite the absence of interallelic processes on the haploid and non-recombining Y chromosome. This thesis aimed to determine the types and rates of mutation events that were occurring at MSY1. Single-molecule analysis was used to analyse mutation in the sperm and blood DNA of a single donor. Sperm mutation rate was 2.6%, and mutants were small-sca

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5

Pirrie, Andrew. "The use of haploid systems in plant genetic manipulation." Thesis, University of Nottingham, 1985. http://eprints.nottingham.ac.uk/11415/.

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In the present study the use of haploid plants and tissues was considered in relation to plant genetic manipulation. Haploid plants can be exploited directly, in the synthesis of true breeding lines. Alternatively, haploid plants and tissues may provide material for further experimentation involving protoplast fusion. Both approaches were investigated. Cyclamen persicum an attractive flowering plant is grown commercially from seed produced following open cross-pollination. As a result, Cyclamen is highly heterozygous, but the resulting variation is commercially undesirable. Inbreeding depressi

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6

Ramdath, Ramona Sherry. "Aneuploidy: Using genetic instability to preserve a haploid genome?" University of Toledo Health Science Campus / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=mco1243954510.

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7

Ramdath, Ramona. "Aneuploidy : using genetic instability to preserve a haploid genome?" Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=mco1243954510.

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Dissertation (Ph.D.)--University of Toledo, 2009.<br>"In partial fulfillment of the requirements for the degree of Doctor of Philosophy in Biomedical Science." Title from title page of PDF document. Bibliography: p. 87-96.

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8

Ranjbar, Gholam Ali. "Production and utilization of doubled haploid lines in wheat breeding programs /." Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09APSP/09apspr197.pdf.

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9

Song, Jiayin (Susan). "Genomic selection in a single cross doubled-haploid wheat population." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60581.

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A traditional wheat breeding program normally takes 7 to 12 years to develop a new cultivar to be eligible for commercial release. Genomic selection (GS), which uses single-nucleotide polymorphism (SNP) marker information to predict breeding values, has been proven to be an efficient method to accelerate the lengthy breeding process and increase the resultant gain in many animal and plant species. In this study, two GS algorithms, Genomic Best Linear Unbiased Prediction (GBLUP) and Reproducing Kernel Hilbert Space (RKHS) regression, were evaluated using grain yield data generated from a single

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10

Liu, Fuhua. "Quantitative genetics of male-haploid organisms used for biological control." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ35227.pdf.

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11

Aslam, Ferre N. "Haploid production in rapid-cycling Brassica campestris and Brassica napus." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292906.

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12

Triggs, Heidi M. "Haploid production and genetic transformation of wheat (Triticum aestivum L.)." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243689.

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13

Lee, Clarissa Ci. "Haploid reporter screens aimed at identification of NF-kappaB regulators." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/89943.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Biology, 2014.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Nuclear factor-kappaB (NF-KB) is a family of transcription factors that are essential for execution of both the innate and the adaptive immune response. NF-KB regulates hundreds of genes involved in critical processes such as cell survival, differentiation, proliferation, and inflammation. Consequently, NF-KB activity must be tightly regulated and a failure to do so causes diseases such as inflammatory disorders and cancer. The

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14

Livesey, Nancy L. "Towards the haploid production of transgenic wheat (Triticum aestivum L.)." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395623.

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15

Tillquist, Christopher. "Voyages of the Vikings: Human haploid variation in northern Europe." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/279948.

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Europe is a region characterized by a long history of both settlement and resettlement. This study uses information from the haploid systems of the human genome in order to investigate the presence of population structure in Europe and discuss the mitigating effects of shared population history and the impact of evolutionary forces. By means of two kinds of data from the Y chromosome, the study first establishes patterns of diversity across the entirety of Europe. More in-depth analyses investigate the evolutionary effects of settlement and colonization on overall genetic diversity of populati

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16

Nutten, Paul Robert. "Regulation of S. cerevisiae filamentous growth in response to the nature and availability of the extracellular carbon source." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342584.

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17

Bye, Nicholas. "Anther culture and cytogenetic studies in Cochlearia." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329383.

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18

Andrés, Gordillo Gerardo. "Optimization of hybrid maize breeding procedures based on doubled haploid lines." Aachen Shaker, 2007. http://d-nb.info/989297853/04.

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19

Gordillo, Gerardo A. "Optimization of hybrid maize breeding procedures based on doubled haploid lines /." Aachen : Shaker, 2008. http://d-nb.info/989297853/04.

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20

Bradburne, Robert Peter. "The formation and function of glucosinolates in Brassica napus." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327435.

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21

Juškevičienė, Danguolė. "Valgomojo svogūno (Allium cepa L.) ginogenezė ir homozigotinių linijų kūrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060210_121811-38912.

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Peculiarities of edible onions (Allium cepa L.) gynogenesis investigated in the dissertation work. Conditions for creation of dihaploid plants evaluated. Biological assumptions for preparation of methodical suggestions, that would enable improving of gynogenesis, determined. Stimulation effect of using TDZ and NAR in media on the formation of edible onion embryogenic tissue has been revealed for the first time. Characteristic higher frequency of gynogenesis of unfertilized flower of edible onion isolated from the flower stems soaked in 2,4-D solution has been evaluated. By using experimental m

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22

Friesen, Holly A. "The application of doubled haploid plants to population improvement in Brassica rapa." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq23311.pdf.

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23

Gapp, Bianca. "Functional genomics and compound mode-of-action screening in haploid human cells." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:0c2ce8f8-15f3-447f-9117-8953329bd4ac.

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More than a decade after the completion of the human genome project, the function of a large number of genes remains to be elucidated. Forward and reverse genetic approaches have proven to be powerful tools to study gene function and have provided insights into fundamental biological processes. Furthermore, functional genetic screening can lead to a better understanding of the action of endogenous and exogenous stimuli such as hormones or drugs on biological systems. Thus far, systematic and unbiased studies have largely been limited to model organisms. However, complex disease-relevant genoty

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24

Monteiro, Regina Teresa Rosim. "Lipid production and composition in haploid and diploid strains of Aspergillus nidulans." Thesis, University of St Andrews, 1985. http://hdl.handle.net/10023/14174.

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Six auxotrophic mutants of A. nidulans were crossed in a dialell cross system to obtain heterokaryous and heterozygous diploids. In order to ascertain their lipid accumulation ability, some of these mutants and diploids were tested in a minimal medium (with 3% glucose + 0.6% NaNO3), either in a shaker or in an incubator without agitation. Both, the mutants and diploids, exhibited only 4.6% lipid, on a dry weight basis. With the aim of optimising culture conditions for lipid accumulation, a wild type was cultivated in a range of different media and cultural conditions. The best yield (about 24%

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25

Narayan, Monisha. "THE ROLE OF CDC42 IN THE BUDDING PATTERN OF HAPLOID BUDDING YEAST." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366309537.

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26

Liu, Weiguo. "Transformation of microspores for generating doubled haploid transgenic wheat (Triticum aestivum L.)." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Dissertations/Fall2004/w%5Fliu%5F120204.pdf.

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27

Silva, Andreza Jardelino da. "Modelos para análise de dados superdispersos de indução de haploidia em milho." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-20072017-133448/.

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O milho é uma espécie alógama cujo produto comercial são os híbridos, os quais originam-se do cruzamento de duas linhagens endogâmicas. Uma forma para obtenção de tais linhagens é por meio das técnicas de indução de haploidia e posterior obtenção dos duplo-haploides, permitindo até 100% de homozigose. Essas técnicas retornam resultados importantes no melhoramento de milho. Uma variável de interesse importante, obtida a partir dessas técnicas é a taxa de indução de haploidia, a qual trata-se de uma proporção entre o número de sementes haploides e o número total de sementes. O conjunto de dados

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28

Varrieur, John Michael. "AFLP Marker Analysis Of Monoploid Potato." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/33177.

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Potato haploids have been recent components in protoplast fusion research, strategies to combine wild and cultivated potato germplasm and the generation of economically valuable mutant phenotypes. Additionally, most major genetic mapping and QTL analyses in potato have utilized haploid germplasm to simplify linkage-mapping computations. The accuracy of genetic assumptions concerning the randomness and genetic purity of haploid genomes may directly affect the statistical validity of many results in current potato research. In the present study, AFLP analysis was conducted on two sibling S. p

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29

Cutright, Rebecca J. "Derivation and Comparison of Androgenic and Gynogenic Monoploid Potato Families." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37017.

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Monopoloid potato (2n = 1x = 12) can be derived either paternally through anther/microspore culture or maternally through crossing with a haploid-inducing pollinator. Evidence from other genera suggests that androgenic and gynogenic haploid populations derived from the same parent may differ due to gametic selection and/or epigenetic factors. Our objectives were to derive androgenic and gynogenic monoploid populations from each of two diploid (2n = 2x = 24) Solanum phureja clones and compare their phenotypic characteristics in a greenhouse study. A haploid-inducing pollinator, S. phureja IV

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30

Cimò, Giuseppe. "Ploidy manipulation for genetic improvement in some Mediterranean fruit crops." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/79874.

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Plant breeding is focused on selection of new genotypes with improved traits. Conventional methods based on hybridization and those based on biotechnology (somatic hybridization, genetic transformation, ploidy manipulation, etc.) are used to create novel genetic variations. Biotechnology provides powerful tools for plant breeding, for instance, haploid technology allows achievement of homozygous lines from heterozygous parents in one step, which reduces significantly the time required by conventional methods. Concerning woody species, characterized by self-incompatibility, long juvenile period

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31

Dench, Jonathan. "New Computational Approaches to Study the Evolution of Asexual Haploids." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40415.

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Numerous factors can influence the evolutionary fate of mutations. Despite this, we tend to study strong evolutionary drivers, or evolution under simple contexts, in part because they are the conditions we have a means to study. My thesis evaluates novel computational approaches to advance detection, and study, of factors that influence a mutation’s evolutionary outcome. First, I present the novel computational tool AEGIS that I use to detect phylogenetic signals of correlated evolution followed by an experimental approach to evaluate the role of epistasis as a potential cause of correl

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32

Dewan, Dilruba Begum. "Field performance of Brassica rapa L. doubled haploid lines and hybrids in Saskatchewan." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24070.pdf.

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33

Groot, Thomas Volkert Marie. "The effects of symbiont induced haploid thelytoky on the evolution of Brevipalpus mites." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2006. http://dare.uva.nl/document/33053.

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34

Zaki, Maged M. "The cell biology of haploid plant production from microspores of Brassica napus (L)." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292442.

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35

De, Oliveira Ezequiel. "OPTIMIZATION OF DOUBLED HAPLOID PRODUCTION IN BURLEY TOBACCO (Nicotiana tabacum L.)." UKnowledge, 2016. http://uknowledge.uky.edu/pss_etds/75.

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Doubled haploidy (DH) is a plant breeding technique that is often utilized by plant breeders to minimize the time required to reach homozygosity in breeding lines. The first objective of this study was to compare two methods of generating DH lines in tobacco (Nicotiana tabacum L.). Inbred burley tobacco varieties TN 90LC and GR 149LC were used to produce both androgenic derived doubled haploids (ADDH) and maternally derived doubled haploids (MDDH). The relative agronomic performance of TN 90LC and GR 149 LC ADDH and MDDH lines was compared when used either as pure-line cultivars or when used f

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36

Molenaar, Willem [Verfasser], and Albrecht [Akademischer Betreuer] Melchinger. "Improvements of the doubled haploid technology in maize / Willem Molenaar ; Betreuer: Albrecht Melchinger." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2020. http://d-nb.info/1222100606/34.

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37

Gordillo, Gerardo A. [Verfasser]. "Optimization of hybrid maize breeding procedures based on doubled haploid lines / Gerardo A Gordillo." Aachen : Shaker, 2008. http://d-nb.info/116279240X/34.

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38

Andrés, Gordillo Gerardo [Verfasser]. "Optimization of hybrid maize breeding procedures based on doubled haploid lines / Gerardo A Gordillo." Aachen : Shaker, 2008. http://nbn-resolving.de/urn:nbn:de:101:1-2018071506182973709317.

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39

Rinonos, Serendipity Zapanta. "OVERT AND LATENT PATHWAYS OF POLARITY SPECIFICATION IN ZYGOTES: THE HAPLOID-TO-DIPLOID TRANSITION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1354902108.

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40

Kubik, Thomas James. "Evaluation of doubled haploid lines derived from interspecific crosses between Brassica napus and Brassica rapa." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40073.pdf.

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41

Hermans, Née Hotzy Cosima. "Selection in sperm and its consequences : Exploring haploid selection, ageing and epigenetic effects in sperm." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-320437.

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Sexually reproducing eukaryotes are typically going through a biphasic life cycle with a diploid and a haploid phase. Unlike in plants where selection on haploid pollen genotypes is well established, the possibility of selection occurring in animal sperm is currently not known. One of the main reasons for this lack of knowledge is the general assumption that due to the shortness and the apparent absence of gene expression in haploid sperm, selection during that phase is unlikely to occur. The aim of this thesis was to fill this gap and address some of the main fundamental questions. I investig

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42

Turan, Hasan Necati Savaşkan Çiğdem. "Gama ışınlamanın makarnalık buğday bitkisinde (Triticum durum Desf.) haploid embriyo üretimi ve bitki regenerasyonuna etkisi /." Isparta: SDÜ Fen Bilimleri Enstitüsü, 2007. http://tez.sdu.edu.tr/Tezler/TF00999.pdf.

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43

Michel, Adriano. "Formação de estruturas androgenéticas por cultura de anteras de trigo em função de doses de nitrogênio e boro aplicadas às plantas doadoras." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-10112014-104052/.

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O trigo é um alimento básico da humanidade cuja demanda cresce proporcionalmente ao aumento populacional. Existe carência de pesquisas sobre o efeito da nutrição da planta doadora na resposta androgenética. Este trabalho teve por objetivo avaliar a influência de cinco concentrações de nitrogênio e de boro (25%, 50%, 100%, 150% e 200%) a partir da solução de Sarruge modificada, no cultivo de plantas de trigo doadoras de anteras visando à obtenção de estruturas embriogênicas androgenéticas. Para tanto, foram avaliados os componentes do rendimento (número de colmos, diâmetro e comprimento do colm

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Manto, Kara Lynne Elizabeth. "Evidence of haploid gene expression of sex-linked candidate genes for putative sex-chromosome specific proteins." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56347.pdf.

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45

Smit, Corneli. "Pyramiding of novel rust resistance genes in wheat, utilizing marker assisted selection and doubled haploid technology." Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85613.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Wheat rust, caused by the Puccinia spp., is a global biotic cause of wheat yield losses. This disease can effectively be combatted by implementing rust resistant wheat cultivars. The release of new resistant wheat cultivars is however prolonged due to the time needed to fix resistance genes in a good quality background and develop pure breeding wheat lines. The aim of this study was the pyramiding of novel species derived leaf and stripe rust resistance genes in bread wheat lines through the utilization of high throughput marker

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46

Rivas, Sendra Alba. "Calcium and cell wall dynamics during microspore embryogenesis and double haploid production in rapeseed and eggplant." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/85548.

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Androgenesis induction is an experimental procedure by which microspores are diverted from their original gametophytic pathway towards embryogenesis by applying specific stresses in vitro. It allows for the production of doubled haploid (DH) pure lines through anther culture or isolated microspore culture followed by chromosome doubling. DH technology is interesting for both basic research and plant breeding. In this Thesis, we studied microspore embryogenesis with two parallel approaches: (I) an applied study directed to the development of the first eggplant (Solanum melongena) highly embryog

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47

Cima, Francieli Fatima. "Otimização de protocolo para produção de plantas duplo-haploides através da cultura de micrósporos isolados de trigo." Universidade Federal de Pelotas, 2014. http://repositorio.ufpel.edu.br:8080/handle/prefix/3063.

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Catalano, Rob D. "Isolation and characterisation of a haploid expressed testis-specific cDNA in mouse using the differential display technique." Thesis, University of Warwick, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264903.

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49

Alshamali, Farida. "Diploid and haploid markers and their distributions in sample populations from Dubai, South Arabian Peninsula and Iran." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438136.

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50

Palumbo, Rose. "The Potential for Green Fluorescent Protein as a Screening Tool in the Production of Haploid Potato Plants." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9651.

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A hybrid between a highly regenerative diploid clone (BARD 1-3) of Solanum phureja and haploid inducer IVP 101 was transformed with Agrobacterium tumefaciens strain 4404 containing plasmid pHB2892 with genes for green florescent protein (GFP) and kanamycin resistance. Hemizygous primary transformants (To) were produced from three leaf discs: 17 diploid plants from one leaf disc, three and nine tetraploids from the other two leaf discs. GFP expression was observed qualitatively under fluorescence microscopes and quantitatively with a GFP meter. Anther culture of tetraploids produced 29 plants,

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