{"id":77966,"date":"2018-03-09T23:23:34","date_gmt":"2018-03-09T23:23:34","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estrategias-de-mejora-de-las-tecnologa%c2%adas-productivas-en-el-ganado-vacuno\/"},"modified":"2018-03-09T23:23:34","modified_gmt":"2018-03-09T23:23:34","slug":"estrategias-de-mejora-de-las-tecnologa%c2%adas-productivas-en-el-ganado-vacuno","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-agrarias\/estrategias-de-mejora-de-las-tecnologa%c2%adas-productivas-en-el-ganado-vacuno\/","title":{"rendered":"Estrategias de mejora de las tecnolog\u00edas productivas en el ganado vacuno"},"content":{"rendered":"<h2>Tesis doctoral de <strong>  Hidalgo Ord\u00f3\u00f1ez Carlos Olegario <\/strong><\/h2>\n<p>El presente trabajo tuvo como objetivo aumentar la eficiencia reproductuva en transferencia de embriones bovinos, actuando sobre las novillas receptoras de embriones in vivo, y tratando de mejorar la producci\u00f3n de ovocitos y su desarrollo in vitro mediante la administraci\u00f3n de retinoides. Para conseguir este \u00faltimo objetivo, se puso a punto una t\u00e9cnica de ovum pick-up que, combinada con un sistema eficiente de producci\u00f3n de embriones, dio lugar a gestaciones tras la transferencia a hembras receptoras. Se ensay\u00f3 tambi\u00e9n un m\u00e9todo de criopreservaci\u00f3n de embriones.  la administraci\u00f3n oral de propilenglicol a novillas receptoras de embriones aument\u00f3 la calidad del cuerpo l\u00fateo y los niveles s\u00e9ricos de progesterona, y permiti\u00f3 seleccionar m\u00e1s receptoras para la transferencia de los embriones; las novillas que recibieron propilenglicol tuvieron \u00edndices de gestaci\u00f3n y parto m\u00e1s elevados que las controles. Los efectos del propilenglicol no se debieron a la correcci\u00f3n de deficiencias nutricionales, aunque se presentaron asociados a cambios de las concentraciones de la progesterona, la insulina y el factor de crecimiento semejante a la insulina.  el cultivo in vitro de zigotos obtenidos tras ovum pick-up y fecundaci\u00f3n in vitro en b2 y c\u00e9lulas vero hizo posible obtener blastocistos que, transferidos a hembras receptoras, dieron lugar a gestaciones a t\u00e9rmino. La vitrificaci\u00f3n de embriones producidos in vitro produjo mejor superviviencia que la congelaci\u00f3n.  el \u00e1cido retinoico durante la maduraci\u00f3n in vitro mejor\u00f3 el desarrollo de los ovocitos y dio lugar a gestaciones tras la transferencia de blastocitos de d\u00eda 7. Los blastocistos de d\u00eda 8 obtenidos de ovocitos tratados con \u00e1cido retinoico presentaron m\u00e1s c\u00e9lulas en la masa celular i nterna. El etanol estimul\u00f3 el desarrollo embrionario y aument\u00f3 el n\u00famero de c\u00e9lulas de la masa celular interna. La administraci\u00f3n de retinol a hembras donantes de ovocitos, elev\u00f3 su<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estrategias de mejora de las tecnolog\u00edas productivas en el ganado vacuno<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estrategias de mejora de las tecnolog\u00edas productivas en el ganado vacuno <\/li>\n<li><strong>Autor:<\/strong>\u00a0  Hidalgo Ord\u00f3\u00f1ez Carlos Olegario <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Le\u00f3n<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 19\/12\/2005<\/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>Carmen D\u00edez Monforte<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Miguel Abad gavin <\/li>\n<li> Mart\u00ednez Garc\u00eda Emilio arsenio (vocal)<\/li>\n<li>Jos\u00e9 Mar\u00eda Villar lacilla (vocal)<\/li>\n<li> De la fuente mart\u00ednez julio (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Hidalgo Ord\u00f3\u00f1ez Carlos Olegario El presente trabajo tuvo como objetivo aumentar la eficiencia reproductuva en transferencia de [&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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