{"id":93776,"date":"2009-05-06T00:00:00","date_gmt":"2009-05-06T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/arquitectura-genetica-del-aislamiento-reproductivo-por-esterilidad-ha%c2%adbrida-entre-drosophila-buzzatii-y-drosophila-koepferae\/"},"modified":"2009-05-06T00:00:00","modified_gmt":"2009-05-06T00:00:00","slug":"arquitectura-genetica-del-aislamiento-reproductivo-por-esterilidad-ha%c2%adbrida-entre-drosophila-buzzatii-y-drosophila-koepferae","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/genetica\/arquitectura-genetica-del-aislamiento-reproductivo-por-esterilidad-ha%c2%adbrida-entre-drosophila-buzzatii-y-drosophila-koepferae\/","title":{"rendered":"Arquitectura gen\u00e9tica del aislamiento reproductivo por esterilidad h\u00edbrida entre drosophila buzzatii y drosophila koepferae."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Tom\u00e1s Ernesto Mor\u00e1n Iturralde <\/strong><\/h2>\n<p>Trabajos anteriores con drosophila koepferae (dk) y drosophila buzzatii (db) mostraron que la base gen\u00e9tica del aislamiento reproductivo en estas especies seguir\u00eda un modelo polig\u00e9nico aditivo sujeto a un umbral. Si bien esto implicar\u00eda que no existen genes \u00fanicos de especiaci\u00f3n o de efecto mayor, esto no significa que otros genes importantes con menores efectos pueden ser detectados. Con el fin de entender mejor la gen\u00e9tica del aislamiento reproductivo entre estas especies, he intentado aislar marcadores moleculares que est\u00e9n asociados al fenotipo est\u00e9ril en machos h\u00edbridos, utilizando para esto aflps (polimorfismos de tama\u00f1o de fragmentos de amplificaci\u00f3n, del ingl\u00e9s amplified fragment length polymorphisms). Para determinar las diferencias existentes entre los machos h\u00edbridos est\u00e9riles y f\u00e9rtiles, he comparado los genotipos de 53 individuos (27 f\u00e9rtiles y 26 est\u00e9riles) obtenidos a partir de cuatro familias resultantes de distintos retrocruzamientos. Los resultados apoyan la idea de que la esterilidad h\u00edbrida es polig\u00e9nica. De los 89 marcadores introgresados espec\u00edficos de dk que segregan y est\u00e1n compartidos por las cuatro familias, 32 marcadores mostraron asociaci\u00f3n significativa con el fenotipo est\u00e9ril. La caracterizaci\u00f3n molecular y la cartograf\u00eda f\u00edsica de estos marcadores permitieron confirmar que se distribuyen en todos los cromosomas, aunque tienden a acumularse en \u00e1reas espec\u00edficas. Adicionalmente, el an\u00e1lisis mediante gen\u00f3mica comparada ha permitido proponer genes candidatos involucrados en las v\u00edas que llevan a la esterilidad h\u00edbrida. Finalmente, se vio que algunos marcadores son en realidad de origen procariota, revelando que en general los procesos gen\u00e9ticos que controlan el aislamiento reproductivo en estas especies pueden ser m\u00e1s complejos de lo que se hab\u00eda pensado en el pasado.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Arquitectura gen\u00e9tica del aislamiento reproductivo por esterilidad h\u00edbrida entre drosophila buzzatii y drosophila koepferae.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Arquitectura gen\u00e9tica del aislamiento reproductivo por esterilidad h\u00edbrida entre drosophila buzzatii y drosophila koepferae. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Tom\u00e1s Ernesto Mor\u00e1n Iturralde <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 05\/06\/2009<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Antonio Fontdevila Vivanco<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Luis Serra camo <\/li>\n<li>Emilio Rol\u00e1n \u00e1lvarez (vocal)<\/li>\n<li>  (vocal)<\/li>\n<li>  (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Tom\u00e1s Ernesto Mor\u00e1n Iturralde Trabajos anteriores con drosophila koepferae (dk) y drosophila buzzatii (db) mostraron que la [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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