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Dissertations / Theses on the topic 'Introgressão'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Seus, Rogério. "Introgressão de nanismo em germoplasma de tomate industrial." Universidade Federal de Viçosa, 2015. http://www.locus.ufv.br/handle/123456789/6901.

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Submitted by Amauri Alves (amauri.alves@ufv.br) on 2015-12-04T15:35:16Z No. of bitstreams: 1 texto completo.pdf: 791377 bytes, checksum: eecc2873f556f6348ae12840ea578852 (MD5)<br>Made available in DSpace on 2015-12-04T15:35:16Z (GMT). No. of bitstreams: 1 texto completo.pdf: 791377 bytes, checksum: eecc2873f556f6348ae12840ea578852 (MD5) Previous issue date: 2015-05-20<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>O setor de tomate industrial se desenvolveu muito nos últimos anos, principalmente por causa da mecanização no campo de produção. Entretanto, podem ocorrer

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2

Silva, Kelly Justin da. "Introgressão de híbridos transgênicos e convencional em milho crioulo." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/135157.

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Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias, Programa de Pós-Graduação em Recursos Genéticos Vegetais, Florianópolis, 2015.<br>Made available in DSpace on 2015-09-22T04:11:38Z (GMT). No. of bitstreams: 1 334500.pdf: 2215960 bytes, checksum: 94a2277129c588f5b8fc62a1b6ff8e8a (MD5) Previous issue date: 2015<br>O milho é a cultura mais amplamente distribuída em todo o mundo e possui um papel chave na segurança alimentar. Muitas pesquisas estão direcionadas ao milho transgênico, pois é amplamente cultivado e ainda gera dúvidas entre os cientistas. Os imp

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Trigo, Tatiane Campos. "Hibridação e introgressão entre espécies de felídeos neotropicais (Mammalia, Carnivora)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15490.

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A hibridação entre espécies ou populações pode propiciar uma excelente oportunidade de estudo das relações genéticas, ecológicas e demográficas entre táxons relacionados, e dos processos evolutivos envolvidos na manutenção da distinção entre estes. Neste estudo, procuramos avaliar diferentes aspectos biológicos envolvidos nos processos de hibridação entre três espécies de felídeos Neotropicais: Leopardus tigrinus, L. geoffroyi e L. colocolo. A investigação genética, realizada por meio da análise combinada de diferentes marcadores moleculares como DNA mitocondrial, locos de microssatélite e seg

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4

Fonseca, Gabriela de Magalhães da. "Avaliação da resposta de genótipos de arroz irrigado a herbicidas do grupo químico das imidazolinonas." Universidade Federal de Pelotas, 2011. http://repositorio.ufpel.edu.br/handle/ri/1189.

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Made available in DSpace on 2014-08-20T13:25:43Z (GMT). No. of bitstreams: 1 Dissertacao_Gabriela_Fonseca.pdf: 1203937 bytes, checksum: 0779cafbd315bd99d44d8fbe5a6537c7 (MD5) Previous issue date: 2011-03-16<br>The red rice (Oryza sativa) co-exists with the cultivated rice in commercial farmings, becoming one of the main limiting factors for the yield increase in this crop, since this weed competes for the same resources. The rice crop is one of the most important in the world, being the main nutritious source for more than half of the world´s population. Genes for resistance to herbici

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5

Guimarães, Lúcio Mauro of Silva. "Introgressão de resistência a tospovírus no tomateiro cultivado por meio de cruzamentos interespecíficos." Universidade Federal de Viçosa, 2002. http://www.locus.ufv.br/handle/123456789/10292.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-05-10T17:38:43Z No. of bitstreams: 1 texto completo.pdf: 609213 bytes, checksum: 2d38b204162050215b755964519aea1f (MD5)<br>Made available in DSpace on 2017-05-10T17:38:43Z (GMT). No. of bitstreams: 1 texto completo.pdf: 609213 bytes, checksum: 2d38b204162050215b755964519aea1f (MD5) Previous issue date: 2002-01-31<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Plantas dos acessos de Lycopersicon peruvianum (LA 444/1-19, LA 371-20, PI 126444-3, PI 126928-2, PI 126944-6 e PI 126944-12) e de L. chilense (L

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6

Paiva, Ana Paula Maia [UNESP]. "Cruzamentos entre linhagens tropicais de milho doce e testadores com introgressão de germoplasma temperado." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/93578.

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Made available in DSpace on 2014-06-11T19:26:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-23Bitstream added on 2014-06-13T19:54:55Z : No. of bitstreams: 1 000752787.pdf: 949203 bytes, checksum: 3f4fc6994a1e80343b347a26e1cadb07 (MD5)<br>O presente trabalho tem por objetivo avaliar a capacidade de combinação de linhagens tropicais e testadores com introgressão de germoplasma temperado para a produção de híbridos de milho doce adaptados as condições brasileiras. Foram obtidos vinte e dois híbridos topcrosses originários dos cruzamentos de onze linhagens tropicais de milho super

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7

Paiva, Ana Paula Maia 1988. "Cruzamentos entre linhagens tropicais de milho doce e testadores com introgressão de germoplasma temperado /." Botucatu :, 2014. http://hdl.handle.net/11449/93578.

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Orientador: Norberto da Silva<br>Coorientador: Maurício Dutra Zanotto<br>Banca: Rumy Goto<br>Banca: Aniello Antonio Cutolo Filho<br>Resumo: O presente trabalho tem por objetivo avaliar a capacidade de combinação de linhagens tropicais e testadores com introgressão de germoplasma temperado para a produção de híbridos de milho doce adaptados as condições brasileiras. Foram obtidos vinte e dois híbridos topcrosses originários dos cruzamentos de onze linhagens tropicais de milho super doce em cruzamento com dois testadores super doce que apresentavam introgressão de germoplasma temperado. As linha

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8

Moraes, Rita Maria Alves de. "Introgressão de alelos para alto teor de proteína em soja assistida por marcadores moleculares." Universidade Federal de Viçosa, 2003. http://www.locus.ufv.br/handle/123456789/10561.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-06-06T16:50:37Z No. of bitstreams: 1 texto completo.pdf: 463869 bytes, checksum: 0aa796e02ec00cabc4aadbba1841b3f9 (MD5)<br>Made available in DSpace on 2017-06-06T16:50:37Z (GMT). No. of bitstreams: 1 texto completo.pdf: 463869 bytes, checksum: 0aa796e02ec00cabc4aadbba1841b3f9 (MD5) Previous issue date: 2003-04-10<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>O teor de proteína no farelo de soja tem influenciado o preço final pago ao produtor. Por esta razão, um dos principais objetivos do melhoramen

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Melloni, Maria Natália Guindalini. "Caracterização molecular, citogenética e fenotípica de acessos do "Complexo Saccharum" para fins de introgressão genética /." Jaboticabal, 2014. http://hdl.handle.net/11449/121956.

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Orientador: Luciana Rossini Pinto<br>Banca: Mauro Alexandre Xavier<br>Banca: Luciana Aparecida Carlini Garcia<br>Banca: Dilermando Perecin<br>Banca: Vitor Fernandes Oliveira de Miranda<br>Resumo: A demanda crescente pelo etanol combustível como fonte de energia renovável traz uma série de novos desafios aos programas de melhoramento, uma vez que, atrelado ao aumento da produtividade será necessário o desenvolvimento de novos cultivares de cana-de-açúcar com maior produção de biomassa para sua utilização na produção de energia elétrica e etanol celulósico ou de segunda geração. A incorporação d

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Melloni, Maria Natália Guindalini [UNESP]. "Caracterização molecular, citogenética e fenotípica de acessos do Complexo Saccharum para fins de introgressão genética." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/121956.

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Made available in DSpace on 2015-04-09T12:28:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-12-17Bitstream added on 2015-04-09T12:47:59Z : No. of bitstreams: 1 000817686.pdf: 2423344 bytes, checksum: a0990724dc319c10d59c51cad68e0d66 (MD5)<br>A demanda crescente pelo etanol combustível como fonte de energia renovável traz uma série de novos desafios aos programas de melhoramento, uma vez que, atrelado ao aumento da produtividade será necessário o desenvolvimento de novos cultivares de cana-de-açúcar com maior produção de biomassa para sua utilização na produção de energia elétrica

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11

Badaraco, Jeferson Loureiro. "Caracterização do polimorfismo de Echinococcus granulosus em dois genes nucleares e um mitocondrial : evidências de introgressão." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/13632.

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Nos parasitos do gênero Echinococcus observam-se grandes diferenças genéticas entre as espécies. Mais ainda, a espécie E. granulosus apresenta uma grande variação intraespecífica. Diversas variantes com características biológicas e epidemiológicas particulares, e adaptadas a hospedeiros intermediários diferentes, foram classificadas como linhagens. De fato, estas linhagens são muitas vezes tão divergentes geneticamente quanto as demais espécies do gênero. Isto tem gerado diversas discussões quanto seu status taxonômico. Os genes do antígeno B (AgB) de Echinococcus compõem uma família multigêni

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Prado, Fernanda Dotti do [UNESP]. "Marcadores moleculares na identificação de híbridos e introgressão genética em populações de Pseudoplatystoma corruscans e Pseudoplatystoma reticulatim." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/114054.

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Made available in DSpace on 2015-01-26T13:21:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-02-27Bitstream added on 2015-01-26T13:30:19Z : No. of bitstreams: 1 000799160.pdf: 880064 bytes, checksum: 14ae5d673f01845508368f93f576c2fa (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Níveis de diversidade e estruturação genética, assim como a investigação de eventos de hibridação interespecífica ou introgressiva em populações selvagens, estão entre as principais análises a serem consideradas em projetos de conservação. A hibridação entre espécies nativas de pe

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Prado, Fernanda Dotti do. "Marcadores moleculares na identificação de híbridos e introgressão genética em populações de Pseudoplatystoma corruscans e Pseudoplatystoma reticulatim /." Botucatu, 2014. http://hdl.handle.net/11449/114054.

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Orientador: Fábio Porto Foresti<br>Banca: Pedro Manoel Galetti Júnior<br>Banca: Fernanda Simões de Almeida<br>Banca: José Augusto Senhorini<br>Banca: Diego Teruo Hashimoto<br>Resumo: Níveis de diversidade e estruturação genética, assim como a investigação de eventos de hibridação interespecífica ou introgressiva em populações selvagens, estão entre as principais análises a serem consideradas em projetos de conservação. A hibridação entre espécies nativas de peixes, principalmente quando decorrente de ações humanas, tem levado a taxas crescentes de cruzamentos não naturais entre diferentes taxa

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14

Costa, Márcia Regina. "Introgressão de genes de resistência à antracnose, ferrugem e mancha-angular no cultivar de feijão Diamante Negro." Universidade Federal de Viçosa, 2004. http://www.locus.ufv.br/handle/123456789/10499.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-06-02T14:47:20Z No. of bitstreams: 1 texto completo.pdf: 535262 bytes, checksum: 00421f94daf70463c86c818e417df696 (MD5)<br>Made available in DSpace on 2017-06-02T14:47:20Z (GMT). No. of bitstreams: 1 texto completo.pdf: 535262 bytes, checksum: 00421f94daf70463c86c818e417df696 (MD5) Previous issue date: 2004-02-13<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>O cultivar de feijão preto Diamante Negro além da boa aceitação comercial, apresenta resistência ao crestamento-bacteriano-comum e ao mosaico c

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Fávero, Alessandra Pereira. "Cruzabilidade entre espécies silvestres de Arachis visando à introgressão de genes de resistência a doenças no amendoim cultivado." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-21092004-160937/.

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O amendoim (Arachis hypogaea) é a quarta oleaginosa mais consumida no mundo. O Brasil produziu, em 2002, aproximadamente 190 mil toneladas, sendo que 80% da área plantada situa-se no Estado de São Paulo. O principal problema da cultura neste Estado e no mundo são as doenças fúngicas de parte aérea. Diversas espécies do gênero Arachis são consideradas resistentes a várias pragas e doenças. Os objetivos dessa pesquisa foram: 1) identificar espécies silvestres pertencentes à Secção Arachis resistentes à mancha castanha (Cercospora arachidicola), mancha preta (Cercosporidium personatum) e f

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Santana, Hevana de Lima. "Introgressão e deslocamento de caracteres numa zona de contato entre Picumnus varzeae e Picumnus cirratus macconnelli no Rio Amazonas." Instituto Nacional de Pesquisas da Amazônia, 2018. http://bdtd.inpa.gov.br/handle/tede/2604.

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Submitted by Inácio de Oliveira Lima Neto (inacio.neto@inpa.gov.br) on 2018-10-01T14:07:13Z No. of bitstreams: 2 Hevana_Santana_Lima.pdf: 5356073 bytes, checksum: b9b929af8971b38e278944467ed5d60f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 2018-10-01T14:07:13Z (GMT). No. of bitstreams: 2 Hevana_Santana_Lima.pdf: 5356073 bytes, checksum: b9b929af8971b38e278944467ed5d60f (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-08-20<br>Coordenação de Aperfeiçoamento de Pessoal de

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Pereira, Alisson Campos. "Introgressão de alelos de resistência aos patógenos da antracnose, mancha-angular e ferrugem em linhagens de feijão tipo carioca." Universidade Federal de Viçosa, 2010. http://locus.ufv.br/handle/123456789/4718.

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Made available in DSpace on 2015-03-26T13:42:14Z (GMT). No. of bitstreams: 1 texto completo.pdf: 470950 bytes, checksum: 73fbed4224c5eccb9b3b581c7757568a (MD5) Previous issue date: 2010-02-11<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Aiming to incorporate resistance to the pathogens anthracnose, angular spot, and rust in the bean lines BRSMG Talismã, VC 8 and VC 9, crosses were made between these lines and line Rudá-R (pyramided Rudá), donor of the genes Phg1, Co-4, Co-10 and Ur-ON, which confer resistance against Pseudocercospora griseola, Colletotrichum lindemuthi

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18

Tomé, Thaís Melega. "Filogeografia de Cattleya loddigesii Lindl. e Cattleya harrisoniana (ex Lindl.) Bateman (Orchidaceae)." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11137/tde-09112016-160309/.

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O Brasil abrange grande diversidade de espécies da família Orchidaceae, onde o gênero Cattleya se destaca devido a reconhecida importância horticultural e espécies altamente relacionadas de difícil delimitação taxonômica. Anteriormente, Cattleya loddigesii e C. harrisoniana foram reconhecidas como espécies distintas devido à descontinuidade morfológica, fenológica e distribuição geográfica. Entretanto, esses critérios não são suficientes para determinar com clareza a delimitação dessas espécies, uma vez que existem populações com características morfológicas e fenológicas intermediárias consid

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Faria, Ricardo Tadeu de. "Introgressão da capacidade de regeneração de plantas "in vitro" da especie Lycopersicon pimpinelliplium para cultivares comerciais do tomateiro (Lycopersion esculentum Mill.)." [s.n.], 1998. http://repositorio.unicamp.br/jspui/handle/REPOSIP/317266.

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Orientador: Rolf Dieter Illg<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-07-24T11:08:00Z (GMT). No. of bitstreams: 1 Faria_RicardoTadeude_D.pdf: 3297661 bytes, checksum: 563e2b374e865ef1c7518e9a5ff157ae (MD5) Previous issue date: 1998<br>Doutorado<br>Genetica Vegetal<br>Doutor em Ciências Biológicas

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Cardoso, Milena Barcelos. "Análises citogenéticas em linhagens sintéticas de Triticum aestivum L. em Thell. (T. durum L. X Aegilops tauschii Coss) e seus cruzamentos com cultivares de trigo, visando a introgressão de resitência à ferrugem da folha." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/13693.

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Uma estratégia bem reconhecida para aumentar o pool gênico do trigo consiste na introdução de genes de espécies selvagens afins. Aegilops tauschii Coss. possui muitas características agronomicamente desejáveis, não facilmente encontradas em trigo (Triticum aestivum L. em Thell), tal como a resistência a patógenos. Com o objetivo de aumentar a resistência do trigo cultivado à ferrugem da folha, quatro hexaplóides sintéticos (PF844005, PF964001, PF964004 e PF964009), desenvolvidos a partir do cruzamento de T. durum L. (AABB) X Ae. tauschii (DD), foram cruzados com quatro cultivares brasileiras d

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Manuel, Montero Marc de 1991. "Genetic introgression in chimpanzees and bonobos." Doctoral thesis, Universitat Pompeu Fabra, 2018. http://hdl.handle.net/10803/665493.

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Els nostres parents més propers, els ximpanzés i els bonobos, tenen una història demogràfica complexa. En aquest estudi, hem analitzat els genomes sencers de 75 ximpanzés i bonobos nascuts en 10 països diferents d'Àfrica. Hem descobert que l'estructura poblacional dels ximpanzés fa possible predir l'origen geogràfic a escala nacional i regional mitjançant dades genètiques. Múltiples linies d’evidencia suggereixen que que l’ancestre dels ximpanzés est- i centre-africans va rebre gens de poblacions de bonobo. Juntament amb un altre contacte possiblement més recent (fa més de 200.000 anys), els b

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Kuhlman, Leslie Charles. "Sorghum introgression breeding utilizing S. macrospermum." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1598.

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Koebner, Robert Max David. "Controlled introgression of alien chromatin into wheat /." Title page, table of contents and abstract only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phk77.pdf.

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Wall, Eileen Elizabeth. "Introgression of favourable alleles into livestock populations." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/14630.

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Jenkins, Toni E. "Introgression of genes from rape to wild turnip." Lincoln University, 2005. http://hdl.handle.net/10182/1844.

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Introgression of genes from crops into ruderal populations is a multi-step process requiring sympatry, synchronous flowering, chromosomal compatibility, successful pollination and development of the zygote, germination, establishment and reproduction of hybrid progeny. The goal of this thesis was to generate data on as many steps in this process as possible and integrate them into a predictive statistical model to estimate the likelihood of successful introgression under a range of scenarios. Rape (Brassica napus) and wild turnip (B. rapa var. oleifera) were used as a model system. A homozygou

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Capblancq, Thibaut. "La spéciation hybride : réflexions générales et exploration d'un cas d'étude chez des papillons alpins du genre Coenonympha." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAV023/document.

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L’hybridation interspécifique est un phénomène très étudié ces dernières années et les conséquences qui lui sont attribuées dans l’évolution des espèces sont diverses. Une littérature de plus en plus fournie met notamment en évidence le rôle que peut avoir l’hybridation sur l’émergence de nouveaux taxons. Mon travail de thèse s’attache à comprendre comment des croisements entre espèces peuvent impacter le processus de spéciation d’une nouvelle lignée évolutive et stimuler ainsi la diversification des organismes vivants.Une revue des différents cas d’espèces hybrides animales proposés dans la l

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Beck, Karen. "Epidemiology of coyote introgression into the red wolf genome." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-03252005-042952/.

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Extensive predator control programs and habitat alterations reduced red wolves, once native to the southeastern United States, to a remnant population found in only a small portion of their historic range by the late 1960?s. Coyotes expanded their range into territories previously occupied by red wolves. As wolves became scarce, they began to breed with the more prevalent coyote. Introgression threatened the continued existence of the genetic integrity of the red wolf. The U.S. Fish and Wildlife Service, following a planned extirpation and institution of a captive breeding program, reintroduce

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Taylor, Lynn. "The potential for introgression in a British polyploid complex." Thesis, University of St Andrews, 1985. http://hdl.handle.net/10023/14207.

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The potential for introgression in the British Senecio polyploid complex was investigated using numerical taxonomic methods. It has been suggested that introgression of the introduced Mediterranean diploid S. squalidus L. into the native British tetraploid species S. vulgaris var. vulgaris (non-radiate) has given rise to the inland radiate morph S. vulgaris var. hibernicus Syme. The research reported in this thesis falls into three main sections. The first part describes the results of a crossing program to determine the interfertility relationships of the British Senecio species, S. vulgaris

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Wilson, Joanna. "Introgression patterns in Scottish blue mussel (Mytilus edulis) populations." Thesis, University of Stirling, 2016. http://hdl.handle.net/1893/25393.

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Background: The blue mussel, Mytilus edulis L., is an important contributor to the shellfish sector of Scottish aquaculture, with 7,270 tonnes worth £8.8 million being produced for the year 2015. Since 2010, production values have fluctuated as a result of inconsistent spat settlement, several business closures, and heightened levels of marine toxins in some areas. On Scotland’s west coast, some farms (most notably Loch Etive) have suffered production losses from the appearance of non-marketable mussels with particularly fragile shells and poor quality meat. Recent research has demonstrated th

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Lawal, Raman Akinyanju. "Signatures of selection and introgression in the genus Gallus." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/48629/.

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Here I investigate, using autosomal whole-genome sequence data, the signature of positive selection and/or introgression in the indigenous domestic village chickens from three countries (Ethiopia, Saudi Arabia, Sri Lanka), three fancy birds, three junglefowl species (red junglefowl Gallus gallus, grey junglefowl G. sonneratii, Ceylon Junglefowl G. lafayettii) and the Javan red junglefowl G. g. bankiva. All the new sequencing data were obtained from Illumina HiSeq 2000/2500 DNA sequencers with an individual bird depth of genome coverage ranging from 10 X to 30 X. The analyses in this thesis hav

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Méheust, Raphaël. "Étude des processus introgressifs en évolution par des méthodes de réseaux." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066534/document.

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L'évolution des organismes, des génomes et des gènes n'est pas strictement arborescente; les symbioses, les transferts horizontaux de gènes ou encore la fusion de gènes créent des objets composites formés de parties dont les histoires évolutives sont différentes. Ces processus non arborescents sont appelés introgressifs et ont un impact non négligeable en évolution. Ils sont à l'origine de transitions évolutives majeures comme l'émergence des eucaryotes, des eucaryotes photosynthétiques ou encore de nombreux groupes d'Archaea. Dans le cas des eucaryotes, l'association et la stabilisation d'une

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Zhou, Y. (Yongfeng). "Demographic history and climatic adaptation in ecological divergence between two closely related parapatric pine species." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206769.

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Abstract Both demographic histories and natural selection complicate the speciation process. There is a need to jointly study the effects of natural selection on so called magic traits that can cause reproductive isolation such as climatic adaptation, and its interaction with neutral demographic histories. Closely related incipient coniferous species offer us a great system for this effort. I used genetic variation at one set of climate-related candidate genes and another set of reference loci and cytoplasmic genomic fragments of two closely related parapatric pine species: Pinus massoniana La

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Oueslati, Soumaya. "Caractérisation génétique du complexe d’espèces des anchois du genre Engraulis en Méditerranée et dans le proche Atlantique." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20195/document.

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La question abordée est celle de la structure génétique des anchois Atlanto-méditerranéens analysée grâce à 6 locus microsatellites et un gène du cytochrome b de l'ADN mitochondrial sur un échantillonnage dont quatre en provenance de lagunes réparti entre la Tunisie, la France, la Mer Noire et le Maroc. Deux locus microsatellites parmi les six étudiés révèlent une forte différenciation liée à l'habitat lagunaire. L'étude du cytochrome b de l'ADN mitochondrial montre la présence de deux clades mitochondriaux trouvés en sympatrie en fréquence variable dans tous les échantillons. L'analyse combin

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Leduc-Robert, Geneviève. "Phylogenetics and introgression of Habronattus jumping spiders using transcriptomes (Araneae:Salticidae)." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55870.

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Habronattus is a diverse genus of jumping spiders with complex courtship displays and colourful ornaments in males. A well-resolved species phylogeny would provide an important framework to study these traits, but has not yet been achieved because of conflicting signals from the few genes available. While such discordant gene trees could be the result of deep coalescence in the recently diverged group, there are many indications that hybridization may have occurred and could be the source of conflict. To infer Habronattus phylogenetic relationships and to investigate the cause of gene tree dis

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Dumas, Emilie. "Interaction entre la bactérie endosymbiotique Wolbachia et les moustiques du complexe Culex pipiens : Des génomes bactériens à la structuration des populations d’hôtes." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20161.

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Wolbachia est une bactérie endosymbiotique, intracellulaire et exclusivement transmise maternellement qui infecterait au moins 106 espèces d'insectes. Wolbachia manipule fréquemment la reproduction de ses hôte à son avantage, notamment en induisant une forme de stérilité conditionnelle appelée incompatibilité cytoplasmique (IC). Chez les moustiques du complexe Culex pipiens, une grande diversité de souches de Wolbachia et de types d'IC a été précédemment identifiée, mais plusieurs aspects de la biologie de cette association restaient peu connus. Les travaux présentés dans cette thèse ont notam

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Beck, Emily Abigail. "Effects of protein-protein interactions on speciation: assessment of cascading positive selection and introgression." Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/6545.

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Speciation is a process by which 1 population splits into 2 distinct populations that in time acquire reproductive isolation (RI). Interestingly, the speed at which RI is attained can be influenced by several factors. My thesis work focuses on how protein-protein interactions affect this process, either by impeding or expediting the acquisition of RI. Here, I present an analysis of cascading positive selection in a group of centromere associated proteins in the Drosophila melanogaster subgroup. Within this group, there are proteins known to interact with rapidly evolving DNA elements located a

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Leitwein, Maeva. "Génomique, repeuplement et conservation chez la truite (Salmo trutta) méditerranéenne." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT070/document.

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La truite commune Salmo trutta L. est l'espèce de salmonidés la plus rependue en Europe. Cette espèce présente une grande diversité phénotypique liée à son histoire évolutive complexe. Chaque année, d’intenses repeuplements ont lieu afin d’augmenter les densités locales de populations, notamment pour la pêche sportive. Des truites d’origine atlantique, domestiquées depuis des décennies, et plus récemment des souches domestiques méditerranéennes, sont largement utilisées pour repeupler les populations sauvages locales d’origine méditerranéenne dans le sud de la France. Jusqu’à présent, les cons

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Simon, Alexis. "Génomique de l’hybridation anthropogénique chez les moules Mytilus spp. et valeur sélective des hybrides." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTG032.

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Les activités anthropiques sont en train de créer de nouveaux contacts entre des lignées génétiques différenciées, nous donnant accès à la phase initiale et à des réplicats de contacts secondaires. Le complexe M. edulis est composé d’un ensemble d’espèces et de lignées partiellement isolées reproductivement, présentant une grande diversité de contacts secondaires et de flux de gènes, constituant un modèle de choix pour l’étude de l’hybridation et de la spéciation. Nous avons profité de plusieurs évènements de contact secondaires, à la fois naturels, anthropiques, et expérimentaux, pour étudier

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Raikar, Sanjeev Vencu. "Protoplast fusion of Lolium perenne and Lotus corniculatus for gene introgression." Phd thesis, Lincoln University. Bio-Protection and Ecology Division, 2007. http://theses.lincoln.ac.nz/public/adt-NZLIU20080214.105406/.

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Protoplast fusion of Lolium perenne and Lotus corniculatus for gene introgression by Sanjeev V. Raikar Lolium perenne is one of the most important forage crops globally and in New Zealand. Lotus corniculatus is a dicotyledonous forage that contains valuable traits such as high levels of condensed tannins, increased digestibility, and high nitrogen fixing abilities. However, conventional breeding between these two forage crops is impossible due to their markedly different taxonomic origin. Protoplast fusion (somatic hybridisation) provides an opportunity for gene introgression between these two

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Raikar, S. V. "Protoplast fusion of Lolium perenne and Lotus corniculatus for gene introgression." Diss., Lincoln University, 2007. http://hdl.handle.net/10182/301.

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Lolium perenne is one of the most important forage crops globally and in New Zealand. Lotus corniculatus is a dicotyledonous forage that contains valuable traits such as high levels of condensed tannins, increased digestibility, and high nitrogen fixing abilities. However, conventional breeding between these two forage crops is impossible due to their markedly different taxonomic origin. Protoplast fusion (somatic hybridisation) provides an opportunity for gene introgression between these two species. This thesis describes the somatic hybridisation, the regeneration and the molecular analysis

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Jefferies, Stephen P. "Marker assisted backcrossing for gene introgression in barley (Hordeum vulgare L.)." Title page, contents and chapter 1 only, 2000. http://web4.library.adelaide.edu.au/theses/09APSP/09apspj45.pdf.

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Bibliography: leaves 183-211. This study evaluates the backcross breeding method for the introgression in barley of agronomically important traits into a malting quality background using molecular markers.

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Coe, Robert Ashley. "The introgression of novel biochemical traits into tomato, a biochemical analysis." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515444.

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Canady, Michael A. "Development and genetic studies of a Solanum lycopersicoides introgression line library /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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Chen, Caifu. "Molecular genome characterization and introgression in Lolium perenne and Festuca species /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9809676.

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Corcoran, Pádraic. "Neurospora tetrasperma from Natural Populations : Toward the Population Genomics of a Model Fungus." Doctoral thesis, Uppsala universitet, Evolutionsbiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-208791.

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The study of DNA sequence variation is a powerful approach to study genome evolution, and to reconstruct evolutionary histories of species. In this thesis, I have studied genetic variation in the fungus Neurospora tetrasperma and other closely related Neurospora species. I have focused on N. tetrasperma in my research because it has large regions of suppressed recombination on its mating-type chromosomes, had undergone a recent change in reproductive mode and is composed of multiple reproductively isolated lineages. Using DNA sequence data from a large sample set representing multiple species

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Choi, Kwang Shik. "Genetic differentiation and introgression in malaria vectors of the Anopheles gambiae complex." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431729.

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Schmidt, Victor T. "The effects of polyspermy, sexual conflict, and gene introgression on gamete incompatibility." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-2/schmidtv/victorschmidt.pdf.

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Gardunia, Brian Wayne. "Introgression from Gossypium mustelinum and G. tomentosum into upland cotton, G. hirusutum." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1183.

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Hapairai, Limb K. M. "Studies on Aedes polynesiensis introgression and ecology to facilitate lymphatic filariasis control." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:8bc43695-4394-4a56-b83d-0a5ffe2dbebd.

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The mosquito Aedes polynesiensis, a member of the Aedes scutellaris complex, is the main vector in the South Pacific region of the Wuchereria bancrofti parasite, the causative agent of lymphatic filariasis (LF), and is also a major nuisance biter. Decades of Mass Drug treatment (MDA) have not been successful in elimination LF. Two non-vector species in the Ae. scutellaris complex were introgressed with Ae. polynesiensis to attempt to obtain lines that would produce cytoplasmic incompatibility (CI) with wild populations and/or LF-refractoriness. Despite selection of progeny from Brugia-challeng

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Chinnathambi, Kannan. "Exploiting wheat ancestral introgression for increased photosynthetic productivity under contrasting environmental conditions." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/48839/.

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Global population is expected to rise to 9 billion in another 40 years and changing climatic conditions coupled with various other abiotic and biotic stress factor have posed challenges for crop cultivars globally. Cereals like wheat, rice and maize have a central place in the human diet and require immediate attention in terms of improving yield in order to satiate the global food demand. This demand can be fulfilled by improving crop yield by exploiting natural variation in modern wheat by conventional breeding method like wheat ancestral introgression. One of the key traits that can be expl

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