{"id":13794,"date":"2018-03-09T09:00:12","date_gmt":"2018-03-09T09:00:12","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-la-variabilidad-y-la-estructura-genetica-en-poblaciones-de-avena-barbata-de-argentina\/"},"modified":"2018-03-09T09:00:12","modified_gmt":"2018-03-09T09:00:12","slug":"estudio-de-la-variabilidad-y-la-estructura-genetica-en-poblaciones-de-avena-barbata-de-argentina","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/estudio-de-la-variabilidad-y-la-estructura-genetica-en-poblaciones-de-avena-barbata-de-argentina\/","title":{"rendered":"Estudio de la variabilidad y la estructura gen\u00e9tica en poblaciones de avena barbata de argentina"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Rosana Guma Irma <\/strong><\/h2>\n<p>Avena barbata es una gram\u00ednea predominantemente aut\u00f3gama, originaria del mediterr\u00e1neo y naturalizada en distintas regiones en am\u00e9rica. En poblaciones espa\u00f1olas y californianas de a. Barbata se han descrito diferentes ecotipos,  caracterizados por combinaciones al\u00e9licas espec\u00edficas para loci isoenzim\u00e1ticos, marcadores morfol\u00f3gicos y variantes deladn ribosomal.  con el objetivo de analizar la variabilidad gen\u00e9tica intra e interpoblacional y la estructura gen\u00e9tica multilocus en 52 poblaciones de a. Barbata procedentes de diferentes regiones ecogeogr\u00e1ficas de la argentina, se utilizaron marcadores isoenzim\u00e1ticos y de adn. Dentro de \u00e9stos \u00faltimos se incluyeron el an\u00e1lisis de rapd, issr y de algunas regiones del genoma mitocondrial y del cloroplasto (adnmt y adncp).  la variabilidad hallada en las poblaciones a partir del an\u00e1lisis de 14 loci isoenzim\u00e1ticos se debe a la coexistencia de diferentes genotipos homocigotos que no se combinan aleatoriamente sino que muestran desequilibrios gam\u00e9ticos entre los distintos loci, dando lugar a la formaci\u00f3n de complejos o asociaciones multilocus. El patr\u00f3n de distribuci\u00f3n de la variaci\u00f3n est\u00e1 relacionado con factores ambientales, especialmente la precipitaci\u00f3n y la temperatura, al igual que ocurre en las poblaciones espa\u00f1olas y californianas. los complejos multilocus comunes aparecen asociados con los mismos par\u00e1metros ambientales en las diferentes regiones, lo que apoyar\u00eda la adaptaci\u00f3n de dichos genotipos a ambientes concretos.  todos los alelos y los genotipos hallados para los loci isoenzim\u00e1ticos analizados en las poblaciones argentinas de a. Barbata se encuentran descritos para las poblaciones de espa\u00f1a, lo que sustenta su origen espa\u00f1ol. La reducci\u00f3n en la variabilidad observada en las poblaciones argentinas, al considerar los loci individualmente, estar\u00eda determinada posiblemente por el efecto fundador que ocurre en los procesos de colonizaci\u00f3n. Sin embargo, la es<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio de la variabilidad y la estructura gen\u00e9tica en poblaciones de avena barbata de argentina<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio de la variabilidad y la estructura gen\u00e9tica en poblaciones de avena barbata de argentina <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Rosana Guma Irma <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Le\u00f3n<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 15\/11\/2001<\/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>Pedro Garc\u00eda Garc\u00eda<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: marcelino P\u00e9rez de la vega <\/li>\n<li>araceli Fominaya yag\u00ed\u00bce (vocal)<\/li>\n<li>gaudencio Ord\u00e1s alonso (vocal)<\/li>\n<li>laureana Rebordinos gonz\u00e1lez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Rosana Guma Irma Avena barbata es una gram\u00ednea predominantemente aut\u00f3gama, originaria del mediterr\u00e1neo y naturalizada en distintas [&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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