{"id":60190,"date":"2018-03-09T22:48:00","date_gmt":"2018-03-09T22:48:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-cromosomas-y-secuencias-de-adn-ribosomico-en-cuatro-especies-de-pectinidos-bivalbia-pectinidae-del-litoral-espanol\/"},"modified":"2018-03-09T22:48:00","modified_gmt":"2018-03-09T22:48:00","slug":"estudio-de-cromosomas-y-secuencias-de-adn-ribosomico-en-cuatro-especies-de-pectinidos-bivalbia-pectinidae-del-litoral-espanol","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/estudio-de-cromosomas-y-secuencias-de-adn-ribosomico-en-cuatro-especies-de-pectinidos-bivalbia-pectinidae-del-litoral-espanol\/","title":{"rendered":"Estudio de cromosomas y secuencias de adn ribosomico en cuatro especies de pectinidos (bivalbia pectinidae) del litoral espa\u00f1ol"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Jose Lopez Pi\u00f1on <\/strong><\/h2>\n<p>La familia pectinidae pertenece a la subclase pteriomorphia de la clase bivalvia, tiene su origen en el per\u00edodo tri\u00e1sico, hace unos 230 millones de a\u00f1os y actualmente consta de unas 400 especies repartidas por todos los mares del mundo, 30 de ellas de importancia comercial. A pesar de que constituyen un grupo exitoso de moluscos bivalvos, los estudios citogen\u00e9ticos y moleculares son escasos e incluyen tan solo unas pocas especies. Este trabajo se centr\u00f3 en cuatro especies del litoral espa\u00f1ol, aequipecten opercularis, hinnites distortus, mimachlamys varia y pecten maximus, planteando describir el cariotipo de las cuatro especies, identificar marcadores para diferenciar los cromosomas y establecer relaciones cariot\u00edpicas en la familia, caracterizar molecularmente la regi\u00f3n its del adn ribos\u00f3mico 18s-28s, constituida por el gen de arnr 5,8s y los espaciadores transcritos internos (its1 e its2), caracterizar la unidad de repetici\u00f3n del adnr 5s, identificar marcadores moleculares \u00fatiles para la diferenciaci\u00f3n de las cuatro especies, e inferir relaciones filogen\u00e9ticas en base a las secuencias de adnr caracterizadas. En a. Opercularis, el cariotipo elaborado est\u00e1 constituido por 2m, 4m-sm y 7 t. Todos los cromosomas del complemento contienen bloques de heterocromatina constitutiva, distingui\u00e9ndose bandas c principales en cuatro pares cromos\u00f3micos en posici\u00f3n intersticial o subterminal, y bandas c secundarias en la regi\u00f3n centrom\u00e9rica de todos los cromosomas y en un tel\u00f3mero de dos pares cromos\u00f3micos. El adnr 18s-28s se localiz\u00f3 en el tel\u00f3mero de un par teloc\u00e9ntrico, existiendo variaciones funcionales y estructurales con p\u00e9rdida y ganancia de sitios nor. El adnr 5s se encontr\u00f3 en un brazo de par un metac\u00e9ntrico en posici\u00f3n subterminal, distribuy\u00e9ndose entre dos loci independientes. En conjunto, las t\u00e9cnicas citogen\u00e9ticas empleadas en a. Opercularis permitieron la diferenciaci\u00f3n de al menos 6 pares cromos\u00f3micos. El cariotipo de h. Distortus c<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio de cromosomas y secuencias de adn ribosomico en cuatro especies de pectinidos (bivalbia pectinidae) del litoral espa\u00f1ol<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio de cromosomas y secuencias de adn ribosomico en cuatro especies de pectinidos (bivalbia pectinidae) del litoral espa\u00f1ol <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Jose Lopez Pi\u00f1on <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 A coru\u00f1a<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 23\/07\/2007<\/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>Ana Mar\u00eda Insua Pombo<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: horacio Naveira fachal <\/li>\n<li>guillermo Rom\u00e1n cabello (vocal)<\/li>\n<li>Ana Mar\u00eda Rodriguez torres (vocal)<\/li>\n<li>alejandro Guerra  d\u00edaz (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Jose Lopez Pi\u00f1on La familia pectinidae pertenece a la subclase pteriomorphia de la clase bivalvia, tiene [&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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