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Dissertations / Theses on the topic 'Spatial genetic structures'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Yu, Xuesong. "Statistical methods for analyzing genomic data with consideration of spatial structures /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/9553.

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2

King, Rachel, and n/a. "Spatial Structure and Population Genetic Variation in a Eucalypt Species Complex." Griffith University. Australian School of Environmental Studies, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20050113.091713.

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In this study, the relative influences of selection, gene flow, and other evolutionary forces on the spatial structure of genetic variation within a eucalypt species complex (the spotted gums: genus Corymbia, section Politaria) were assessed. The study investigated the spatial genetic structure among four putative species of spotted gum (broad-scale), as well as within a single population (fine-scale)of one species, using both molecular and quantitative markers. The spotted gum complex occurs naturally across a range of 2500 km in eastern Australia. Spatial genetic variation within and between

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3

Laurence, Sophie. "GENETIC VARIATION AND POPULATION GENETIC STRUCTURE OF MUSKRAT, ONDATRA ZIBETHICUS, AT DIFFERENT SPATIAL SCALES." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2171.

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Understanding the factors and processes that influence intraspecific genetic variation are essential to better understand evolutionary processes. In this research, I examined patterns of gene flow and their effects on the distribution of genetic variation and spatial genetic structuring at different spatial scales. I used a combination of population genetics, spatial analysis, morphometrics and phylogeography in order to understand the patterns of genetic variation and their resulting phenotypic variations in a semi-aquatic species, the muskrat (Ondatra zibethicus).

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Hailu, Solomon Ghebremeskel. "THE EFFECT OF HABITAT FRAGMENTATION ON THE SPATIAL POPULATION GENETIC STRUCTURE OF SOUTHERN PINE BEETLE (DENDROCTONUS FRONTALIS)." OpenSIUC, 2011. https://opensiuc.lib.siu.edu/theses/624.

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Southern pine beetle (SPB), Dendroctonus frontalis (Zimmerman), is one of the most destructive insect pests of pine trees in southern United States, Mexico and Central America. There is relatively little information on the effect of habitat fragmentation on the connectivity and the spatial population genetics of SPB. This study therefore, adds to previously generated information by assessing how habitat fragmentation affects the spatial population genetic structure of SPB. It also introduces a new approach to the study of bark beetle population dynamics by assessing how landscape variables sha

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5

Lundy, Ian J. "Theoretical population genetics of spatially structured populations /." Title page, contents and summary only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phl962.pdf.

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6

Flint, Gillian F. "Landscape genetics of Alnus glutinosa across contrasting spatial scales in a natural river system." Thesis, University of Stirling, 2015. http://hdl.handle.net/1893/23243.

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The genetic diversity and genetic structure of populations, and the processes shaping gene flow within and between populations, are influenced by the landscapes they occur within. Within terrestrial landscapes, rivers and their riparian habitat are among the most dynamic, diverse and complex of landscapes and their linear structure appears as an interlinking feature across large landscapes. This thesis took a landscape genetics approach to examine the influence of river landscape features on Alnus glutinosa populations, a widespread keystone tree species of European riparian ecosystems. By acc

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7

Forien, Raphael. "The spatial structure of genetic diversity under natural selection and in heterogeneous environments." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX082/document.

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Cette thèse porte sur la structure spatiale de la diversité génétique. Dans un premier temps, nous étudions un processus à valeurs mesure décrivant l'évolution de la composition génétique d'une population soumise à la sélection naturelle. Nous montrons que ce processus satisfait un théorème de la limite centrale, et que ses fluctuations sont données par la solution d'une équation aux dérivées partielles stochastique. Nous utilisons ce résultat pour donner une estimation du fardeau de dérive au sein d'une population structurée en espace.Dans un deuxième temps, nous nous intéressons à la composi

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Zhao, Wanying. "Genetic, Age, and Spatial Structure to Improve Management of Common Privet (Ligustrum vulgare)." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1325115045.

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9

Segelbacher, Gernot. "Genetic structure of capercaillie populations a non-invasive approach at multiple spatial scales /." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964462478.

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10

Tero, N. (Niina). "Genetic structure at different spatial scales in metapopulations of Silene tatarica." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514277694.

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Abstract The genetic structure at different spatial scales and growing habitats was studied on Silene tatarica, using AFLP and microsatellite markers. S. tatarica is a rare perennial plant occurring along riverbanks and shores of two annually flooding rivers in Finland. Regional scale analysis based on AFLP fragment analysis showed that at Oulanka River population structure represented mostly classical metapopulation model. In general, colonization-extinction processes had an important role, dispersal between subpopulations was limited and genetic differentiation was independent of geographic

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11

Mathieson, Iain. "Genes in space : selection, association and variation in spatially structured populations." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:85f051b6-2121-49cf-9468-3ca7ba77cc4a.

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Spatial structure in a population creates distinctive patterns in genetic data. There are two reasons to model this process. First, since the genetic structure of a population is induced by its historical spatial structure, it can be used to make inference about history and demography. Second, these models provide corrections to other analyses that are confounded by spatial structure. Since is it is now common to collect genome-wide data on many thousands of samples, a major challenge is to develop fast, scalable, approximate algorithms that can analyse these datasets. A practical approach is

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12

Charlier, Johan. "Monitoring gene level biodiversity - aspects and considerations in the context of conservation." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-62796.

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The objectives of this thesis relate to questions needed to be addressed in the context of genetic monitoring for implementing the Convention on Biological Diversity for the gene level. Genetic monitoring is quantifying temporal changes in population genetic metrics. Specific goals of this thesis include i) synthesizing existing information relevant to genetic monitoring of Swedish species, ii) providing a genetic baseline for the Swedish moose, iii) evaluating the relative performance of nuclear versus organelle genetic markers for detecting population divergence, iv) actually monitoring the

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13

Xhaard, Constance. "Influence des processus démographiques sur la structure et les caractéristiques génétiques des champignons phytopathogènes : cas de l'agent de la rouille du peuplier Melampsora larici-populina." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10038/document.

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La structure génétique et la dynamique des populations des champignons phytopathogènes peuvent être influencées par de nombreux facteurs, ce que nous avons illustré à différentes échelles chez Melampsora larici-populina, l'agent de la rouille du peuplier. A l'échelle de la France, deux principaux groupes génétiques se différencient. Le premier, inféodé aux hôtes sauvages, est le produit de l'évolution des populations en conditions naturelles. Le second, formé suite au contournement de la résistance R7 portée par le cultivar "Beaupré", se caractérise par une forte proportion d"individus virulen

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Nagahara, Hiroki. "On the Emergence of Spatio-temporal Structures Arising from Genetic Expression." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/131919.

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Martien, Karen Kay Fear. "Conservation of spatially structured populations : lessons from population genetics /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9979969.

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16

Clostio, Rachel Wallace. "Use of environmental variables to infer gene flow and population structure in the gopher tortoise (Gopherus polyphemus) and predict the seroprevalence of an emerging infectious disease." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1230.

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Understanding worldwide declines in reptiles due to factors such as habitat loss and emerging infectious disease has become an increasingly important focus in conservation biology. Here, I use novel approaches from the field of landscape genetics to combine spatial genetic data with landscape data at both regional and local spatial scales to explore natural and anthropogenic landscape features that shape population structure and gene flow in a federally threatened reptile, Gopherus polyphemus. I also utilize approaches from the field of spatial epidemiology to examine the extent to which envir

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Dick, Grant, and n/a. "Spatially-structured niching methods for evolutionary algorithms." University of Otago. Department of Information Science, 2008. http://adt.otago.ac.nz./public/adt-NZDU20080902.161336.

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Traditionally, an evolutionary algorithm (EA) operates on a single population with no restrictions on possible mating pairs. Interesting changes to the behaviour of EAs emerge when the structure of the population is altered so that mating between individuals is restricted. Variants of EAs that use such populations are grouped into the field of spatially-structured EAs (SSEAs). Previous research into the behaviour of SSEAs has primarily focused on the impact space has on the selection pressure in the system. Selection pressure is usually characterised by takeover times and the ratio between t

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18

Straulino, Daniel. "Selection in a spatially structured population." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:3a20f7a3-27cd-4cbb-9e88-7ebb21ce4e0d.

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This thesis focus on the effect that selection has on the ancestry of a spatially structured population. In the absence of selection, the ancestry of a sample from the population behaves as a system of random walks that coalesce upon meeting. Backwards in time, each ancestral lineage jumps, at the time of its birth, to the location of its parent, and whenever two ancestral lineages have the same parent they jump to the same location and coalesce. Introducing selective forces to the evolution of a population translates into branching when we follow ancestral lineages, a by-product of biased sam

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19

Sjolund, M. Jennifer. "Interactions between natural and anthropogenic impacts on the genetic diversity and population genetic structure of European beech forests." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/21657.

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The accurate assessment of forest persistence under environmental change is dependent on the fundamental understanding of the genetic consequences of human intervention and its comparison to that of natural processes, as declines in genetic diversity and changes in its structuring can compromise the adaptive ability of a population. The European beech, Fagus sylvatica, has experienced prolonged human impact over its 14 million ha range with contemporary forests harbouring high ecological, economic, and cultural value. Historical traditional management practices, such as coppicing and pollardin

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Banda, Jo Ann. "Temporal and Spatial Genetic Consistency of Walleye (Sander vitreus) Spawning Groups." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1321498533.

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21

Tournant, Pierline. "Impact du paysage sur la distribution spatiale et génétique des colonies de petit rhinolophe." Thesis, Besançon, 2013. http://www.theses.fr/2013BESA2047.

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Le petit rhinolophe Rhinolophus hipposideros autrefois largement répandu dans le nord-ouest de l’Europe a connu une réduction drastique de ses effectifs au cours de la seconde moitié du XX ème siècle. La destruction et la fragmentation des habitats favorables à cette espèce font partie des principales causes de ce déclin. Une des hypothèses testées ici est que la connectivité de ces habitats influencerait la distribution spatiale des gîtes de maternité. Dans un premier temps nous avons estimé la connectivité fonctionnelle de l’habitat de l’espèce et modélisé la distribution des colonies de mat

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22

Rieux, Adrien. "Etude des processus de dispersion et des flux géniques chez un champignon phytopathogène : le cas de Mycosphaerella fijiensis à l’échelle d’un bassin de production Camerounais." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0011.

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La dispersion est un processus clef dans la dynamique et l'évolution des populations naturelles. En plus de son rôle primordial dans les processus de colonisation, la dispersion influence également les processus d'adaptation des organismes. Chez les pathogènes, une meilleure compréhension des processus de dispersion apparaît de ce fait être un enjeu majeur pour mieux les contrôler. Durant cette thèse, nous avons étudié les processus de dispersion et quantifié les flux de gènes qui en découlent chez le champignon parasite du bananier Mycosphaerella fijiensis. Cette étude a été réalisée à l'éche

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23

Visser, Jacobus Hendrik. "Gene-flow in the rock hyrax (Procavia capensis) at different spatial scales." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85673.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Limited dispersal, territoriality and the occupation of patchy habitats; characters that typify most African rock-dwelling (saxicolous or rupicolous) species, often result in structured genetic patterns with little or no gene-flow among populations (e.g., velvet worms, net-winged midges, elephant shrews, red rock rabbits and a variety of lizards and agamas). In an attempt to deepen our understanding of taxa that inhabit these “terrestrial islands” the distribution of genetic variation was studied at several spatial scales in the

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24

Palmé, Anna. "Assessing and monitoring genetic patterns for conservation purposes with special emphasis on Scandinavia." Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-42942.

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Genetic variation is essential for biological evolution, for maintaining viability of populations, and to ensure ecosystem resilience. Increased human exploitation and environmental change result in rapid loss of biological variation, including genetic diversity. Measures to halt this trend require that biological diversity is assessed and monitored. Assessment of biodiversity includes identifying patterns of distribution of genetic variation within individual species. This thesis focuses on spatial genetic structure and assessment of units for conservation in continuous environments without a

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25

Rouse, Matthew. "Diversity of a disease resistance gene homolog in Andropogon gerardii (poaceae) is correlated with precipitation." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/517.

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26

Piri, Rebecca D. "Spatial Genetic Structure and Local Adaptation within and among Foxtail Pine (Pinus balfouriana subsp. balfouriana) Populations Located in the Klamath Mountains, California." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6018.

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Foxtail pine (Pinus balfouriana) is a subalpine conifer endemic to California, notably separated into two disjunct subspecies. Previous studies have described the northern subspecies,Pinus balfouriana subsp. balfouriana,as having an uncommonly high level of genetic differentiation and no discernible spatial patterns in phenotypic variation. This study seeks to characterize the spatial genetic structure and patterns of selection of the northern subspecies (Pinus balfouriana subsp. balfouriana) using genome-wide data and to identify the influence of ecology and environment on the unique genetic

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Coelho, Natália Helena Pesso. "Estudos genéticos em populações naturais da Macaúba em Reservas Legais de assentamentos rurais no Pontal do Paranapanema." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-17072017-152529/.

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A espécie Acrocomia aculeata (Jacq.) Lodd. ex Mart. é uma palmeira nativa, popularmente conhecida como macaúba, que possui ampla utilização desde a indústria alimentícia até na produção de biodiesel. Para estudos genéticos, foram coletados e extraído DNA de 50 indivíduos da espécie em três assentamentos no Pontal do Paranapanema-SP (FU, PJ e GB) e em Amparo-SP (AM) toatalizando 200 amostras. Os objetivos do trabalho foram caracterizar a diversidade genética, a estrutura genética espacial (EGE) e o sistema reprodutivo da espécie no Pontal do Paranapanema. A diversidade genética foi caracterizad

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Andersson, Bea Angelica. "Analysis of Selection and Genetic Drift in a Dioecious Plant : Spatial Genetic Structure and Selection in Phenotypic Traits in a Young Island Population of Silene dioica." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96275.

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Selection and genetic drift are often competing forces in shaping genetic structure in populations. Genetic drift will often effectively cancel out the effect of selection when population sizes are small, such as in colonizing island populations. On a small island in the Skeppsvik Archipelago in northern Sweden, a newly founded population of Silene dioica has been monitored since it first established around 1993. Though inhabiting an area of merely 173 m2, the population has been shown to exhibit a genetically differentiated patch structure where closely related individuals are tightly grouped

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Ruggiero, Maria Valeria. "Spatial genetic structure in the clonal marine angiosperm Cymodocea nodosa : the influence of dispersal potential, mating system and species interactions." Thesis, Open University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409867.

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Wilson, Ian Joseph. "Genetic differentiation in spatially structured populations with particular regard to the Atlantic salmon (Salmo salar L.)." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/12153.

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The interpretation of genetic diversity within subdivided populations is a difficult problem. This thesis develops new theory for its interpretation, and applies it to the problem of within river variation in Atlantic salmon (<I>Salmo salar</I> L.) populations which have been the subject of many surveys of genetic diversity throughout their range. These surveys have found lower levels of genetic variation than many fish species, even those occupying similar environments such as the Brown Trout (<I>Salmo Trutta</I> L.). Genetic differentiation has been observed both between samples from differe

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Feres, Juliana Massimino. "Diversidade Genética, Fluxo Gênico e Sistema de Cruzamento de Anadenanthera colubrina (VELL.) Brenan e Anadenanthera peregrina (L.) Speg: duas Espécies que ocorrem em Alta Densidade no Interior do Estado de São Paulo." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/17/17135/tde-21052014-105106/.

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Anadenanthera é um gênero botânico pertencente à família Mimosaceae e endêmico da América Latina e Caribe. Compreende duas espécies arbóreas tropicais: Anadenanthera colubrina (Vell.) Brenan. (angico, angico vermelho, angico branco, curupay) e Anadenanthera peregrina (L.) Speg. (angico, angico preto, angico de casca, angico do cerrado, yopo ou cohoba). As duas espécies são de ocorrência frequente na paisagem da região de Ribeirão Preto, apresentando-se em aglomerados quase monoespecíficos popularmente conhecidos como angicais. Visando contribuir para futuras medidas conservacionistas, o objeti

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Tambarussi, Evandro Vagner. "Contemporary gene flow, mating system, and spatial genetic structure in a Jequitibá-rosa (Cariniana legalis Mart. Kuntze) fragmented population by microsatellite markers." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-24032014-101908/.

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Cariniana legalis Mart. O. Kuntze (Lecidiaceae) is the largest tree of the Atlantic Forest. To contribute to in situ and ex situ genetic conservation programs for the species, herein we investigate the genetic diversity, inbreeding, intrapopulation spatial genetic structure (SGS), mating system and contemporary pollen flow in three fragmented populations of this species. We found 65 adult trees in the Ibicatu population, 22 in MGI, and four in MGII. Seeds were hierarchically sampled among and within fruits directly from the canopy of 15 seed-trees in Ibicatu (n= 40), five seed-trees in MGI (n=

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Corrales, Duque Carolina. "Population Genetic Structure of Black Grouse (Tetrao tetrix) : From a Large to a Fine Scale Perspective." Doctoral thesis, Uppsala universitet, Institutionen för ekologi och genetik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-150117.

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Black grouse (Tetrao tetrix) is a bird species with a lek mating system found in the Palearctic boreal taiga. It is assumed that it has a continuous distribution along Scandinavia and Siberia, whereas in Central Europe it has declined during the last decades. The primary objective of this thesis was to obtain a deeper understanding of the history, systematic classification and the genetic structure of black grouse on different geographical scales using microsatellites and control region mtDNA sequences (CR). I determined how much the mating system, habitat fragmentation and historical populati

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Puncher, Gregory Neils <1980&gt. "Assessment of the population structure and temporal changes in spatial dynamics and genetic characteristics of the Atlantic bluefin tuna under a fishery independent framework." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7227/.

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As a large and long-lived species with high economic value, restricted spawning areas and short spawning periods, the Atlantic bluefin tuna (BFT; Thunnus thynnus) is particularly susceptible to over-exploitation. Although BFT have been targeted by fisheries in the Mediterranean Sea for thousands of years, it has only been in these last decades that the exploitation rate has reached far beyond sustainable levels. An understanding of the population structure, spatial dynamics, exploitation rates and the environmental variables that affect BFT is crucial for the conservation of the species. The a

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Morin, Dana Janine. "Spatial ecology and demography of eastern coyotes (Canis latrans) in western Virginia." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/54942.

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Coyote (Canis latrans) range expansion in the Central Appalachian Mountains has stimulated interest in ecology of this predator and potential impacts to prey populations. This is particularly true in the Ridge and Valley Region in western Virginia where white-tailed deer (Odocoileus virginianus) populations are restricted by low nutritional carrying capacity and are subject to two other predators, bobcats (Lynx rufus) and American black bears (Ursus americanus), in addition to an active hunter community. I address two primary objectives of the Virginia Appalachian Coyote Study: to investigate

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Guthke, Philipp [Verfasser], and András [Akademischer Betreuer] Bárdossy. "Non-multi-Gaussian spatial structures: process-driven natural genesis, manifestation, modeling approaches, and influences on dependent processes / Philipp Guthke. Betreuer: András Bárdossy." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2013. http://d-nb.info/1041875592/34.

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Randon, Marine. "Structure spatiale et connectivité au sein du stock de sole commune de Manche Est : Apport d’une approche holistique multitraceur." Thesis, Rennes, Agrocampus Ouest, 2020. http://www.theses.fr/2020NSARH112.

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La sole commune (Solea solea) est un poisson plat nourricerie-dépendant ayant été surexploité en Manche Est (division VIId). L’une des causes de ce déclin pourrait être le décalage entre l’unité de gestion (stock) et l’unité fonctionnelle (population). L’objectif de cette thèse était de déterminer la structure spatiale du stock de sole commune de Manche Est en se focalisant sur les stades de vie préadultes et adultes et de statuer sur le potentiel décalage entre l’unité de stock et la population sous-jacente. Pour cela, une approche holistique multitraceur a été développée en combinant des app

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Ledoux, Jean-Baptiste. "Biologie de la conservation du corail rouge, Corallium rubrum (Linnaeus, 1758) : impact du changement global sur l'évolution des populations infralittorales en Méditerranée Nord-Occidentale." Thesis, Aix-Marseille 2, 2010. http://www.theses.fr/2010AIX22096/document.

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Les pressions anthropiques agissent en synergie du gène à l’écosystème, des régions polaires aux régions tropicales et induisent une érosion biologique telle, qu'elle est qualifiée de sixième extinction de masse.Ce constat pose la question de l’évolution de la biodiversité face aux changements environnementaux en cours. C’est dans ce contexte que s’inscrit ce travail de thèse focalisé sur les populations de surface (5 -60 m) de corail rouge, Corallium rubrum (Linnaeus, 1758), en Méditerranée Nord-Occidentale.Le corail rouge (Octocorallia, Coralliidae) est une espèce sessile à phase larvaire ca

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Nougué, Odrade. "Ecologie évolutive des limites de niche : cas de l’adaptation à la salinité de l'artémie." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS262/document.

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Le concept de niche a été défini par Hutchinson comme un espace multidimensionnel de variables environnementales où l'espèce survie. Au cours de ce travail, je me suis intéressée à différentes limites conceptuelles et opérationnelles du concept de niche. En m'appuyant sur le cas de l'adaptation à la salinité chez le genre Artemia – branchiopode extrêmophile – nous nous sommes intéressés : (i) aux mécanismes à l'origine du maintien du polymorphisme génétique d'une large population clonale, qui m'a permis de m'interroger sur l'échelle utile à l'application du concept de niche ; (ii) à l'impact d

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Ramos, Santiago Linorio Ferreyra. "Estrutura genética e fluxo gênico em populações naturais de tucumã-do-Amazonas por meio de microssatélites visando o manejo e conservação da espécie." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-12082014-105840/.

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O tucumã-do-Amazonas (Astrocaryum aculeatum), da família Arecaceae, é uma espécie com ocorrência na Amazônia Ocidental e Central brasileira. Seu fruto é muito apreciado na região amazônica que consome a polpa na forma fresca. Sua produção é feita pelos agricultores extrativistas. Não existem informações dos parâmetros de diversidade e estrutura genética das populações naturais desta espécie, fundamental para o estabelecimento de estratégias adequadas no uso deste recurso genético, e para aumentar a eficiência da domesticação e seleção para um programa de melhoramento genético. Não é conhecido

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Chumacero, de Schawe Claudia [Verfasser], Teja [Akademischer Betreuer] Tscharntke, Michael [Akademischer Betreuer] Kessler, Isabell [Akademischer Betreuer] Hensen, and Dirk [Akademischer Betreuer] Gansert. "Pollination ecology and spatial genetic population structure of wild and cultivated species of cacao (Theobroma) in Bolivia / Claudia Chumacero de Schawe. Gutachter: Michael Kessler ; Isabell Hensen ; Dirk Gansert. Betreuer: Teja Tscharntke." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1048734498/34.

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Dafreville, Stéphanie. "Diversité et structuration génétique des sapotacées endémiques de l'archipel des Mascareignes à différentes échelles spatiales et temporelles." Thesis, La Réunion, 2013. http://www.theses.fr/2013LARE0033.

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L'archipel des Mascareignes (Réunion, Maurice et Rodrigues) est, avec les Seychelles, les Comores et Madagascar, l'un des 34 « hotspots » de biodiversité reconnus à l'échelle mondiale. Dans un contexte de disparition des habitats par les activités humaines, l'objectif de la thèse a été de comprendre la dynamique évolutive à différentes échelles spatiales et temporelles d'une famille d'espèces indigènes des écosystèmes forestiers, les Sapotacées. Ces espèces arborées présentent une gamme diversifiée de niveaux d’endémisme, d'abondance, de modes de régénération et de caractéristiques biologiques

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Ndiade, Bourobou Dyana. "Dynamique spatiale et temporelle de la diversité génétique d’une espèce rare en Afrique Centrale : baillonella toxisperma Pierre (le Moabi)." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20045/document.

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Si les patrons d'expression de la diversité génétique des essences forestières à distribution grégaire des forêts tropicales humides ont fait l'objet de nombreuses études, les connaissances sur les essences forestières disséminées et représentées à très faible densité à l'hectare (dites rares) restent encore embryonnaires. Ces dernières suivent elles les mêmes patrons de distribution de la diversité génétique? Quels facteurs biotiques et abiotiques régissent l'organisation spatiale et l'évolution de la diversité génétique chez ce type d'espèce ? Afin d'améliorer les connaissances sur la biolog

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SOARES, Thannya Nascimento. "ESTRUTURA GENÉTICA POPULACIONAL E FLUXO GÊNICO EM Dipteryx alata VOGEL (FABACEAE) NO CERRADO." Universidade Federal de Goiás, 2009. http://repositorio.bc.ufg.br/tede/handle/tde/452.

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Made available in DSpace on 2014-07-29T14:52:09Z (GMT). No. of bitstreams: 1 Tese thannya nascimento.pdf: 3166640 bytes, checksum: 0a9faeb659c9594423ee5e7f8b495662 (MD5) Previous issue date: 2009-01-22<br>The goal of this study was to evaluate the genetic structure and the spatial pattern of intra and interpopulational gene flow of Dipteryx alata Vogel, based on nuclear and chloroplastidial microsatellite markers. Primers were developed based on sequencing of random fragments from a shotgun genomic library for detection of microsatellite regions. 12 microsatellites regions were obtained from

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Carron, Léopold. "Analyse à haute résolution de la structure spatiale des chromosomes eucaryotes Boost-HiC : Computational enhancement of long-range contacts in chromosomal contact maps Genome supranucleosomal organization and genetic susceptibility to disease." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS593.

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L’information génétique est portée par la molécule d’ADN, un polymère de nucléotides de très grande taille. Afin de mieux comprendre les mécanismes impactant le repliement de l’ADN, on peut exploiter une technique de génomique qui permet de quantifier les contacts entre régions distales du génome. Cette technique expérimentale appelée ’capture de conformation de chromosome’ (Hi-C) donne des informations quantitatives sur l’architecture et le repliement tridimensionnel des chromosomes dans le noyau. Largement utilisée chez l’Homme, la souris et la drosophile, cette technique a grandement évolué

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Lopez-Gallego, Cristina. "Effects of habitat degradation on the evolutionary dynamics of populations in a rainforest cycad (Gymnospermae)." ScholarWorks@UNO, 2007. http://scholarworks.uno.edu/td/555.

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In addition to habitat loss and fragmentation, habitat degradation can have important consequences for biodiversity and population persistence, including effects on ecological and genetic processes beyond decreased demographic viability and the loss of genetic variation. Particularly interesting is the potential for evolutionary changes and adaptation to degraded habitats, that can affect population viability even in the short-term. Here, I explore how environmental changes after habitat degradation affect the evolutionary dynamics of populations of the rainforest cycad Zamia fairchildiana, sp

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Silva, Marcelo Corrêa da. "Genômica de populações e genética geográfica de bovinos Pantaneiros e Curraleiro Pé-Duro com uso de polimorfismos de base única (SNP)." Universidade Federal de Goiás, 2015. http://repositorio.bc.ufg.br/tede/handle/tede/5481.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-18T10:48:49Z No. of bitstreams: 2 Tese - Marcelo Corrêa da Silva - 2015.pdf: 7209207 bytes, checksum: c24f13fb20a00a3bc5b7d242ee956d69 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-18T10:51:37Z (GMT) No. of bitstreams: 2 Tese - Marcelo Corrêa da Silva - 2015.pdf: 7209207 bytes, checksum: c24f13fb20a00a3bc5b7d242ee956d69 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Made avail

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Pandey, Madhav. "Development of microsatellites in sycamore maple (Acer pseudoplatanus L.) and their application in population genetics." Doctoral thesis, Saarbrücken VDM Verlag Dr. Müller, 2005. http://d-nb.info/991343905/04.

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Zugl.: Göttingen, Univ., Diss., 2005 u.d.T.: Pandey, Madhav: Development of microsatellites in sycamore maple (Acer pseudoplatanus L.) and their application in population genetics<br>Hergestellt on demand

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Martínez, Ainsworth Natalia Elena. "Characterizing the genomic determinants and phenotypic responses to altitudinal adaptation in teosintes (Zea mays ssp. parviglumis and ssp. mexicana)." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS376.

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Les deux sous-espèces annuelles de téosinte qui sont les plus proches parents sauvages du maïs sont d’excellents systèmes pour étudier l’adaptation locale car leur distribution couvre un large éventail de conditions environnementales. Zea mays ssp. parviglumis est distribuée dans un habitat chaud et mésique en dessous de 1800 m d’altitude, tandis que Zea mays ssp. mexicana prospère dans des conditions sèches et fraîches à des altitudes plus élevées. Nous avons combiné des approches d’écologie inverse et de génétique association afin d’identifier les déterminants de l'adaptation locale chez ces

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Skone, Gwyn S. "Stratagems for effective function evaluation in computational chemistry." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:8843465b-3e5f-45d9-a973-3b27949407ef.

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In recent years, the potential benefits of high-throughput virtual screening to the drug discovery community have been recognized, bringing an increase in the number of tools developed for this purpose. These programs have to process large quantities of data, searching for an optimal solution in a vast combinatorial range. This is particularly the case for protein-ligand docking, since proteins are sophisticated structures with complicated interactions for which either molecule might reshape itself. Even the very limited flexibility model to be considered here, using ligand conformation ensemb

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