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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
22/09/2016 |
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Actualizado : |
22/09/2016 |
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Tipo de producción científica : |
Abstracts/Resúmenes |
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Autor : |
ALVEZ, A.; GUILLEN, S.; SEQUEIRA, M.; MEIKLE, A.; VIÑOLES, C. |
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Afiliación : |
ANDREA LORENA ALVEZ CERIZOLA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SERRANA GUILLEN DUARTE, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Universidad de la República (UdelaR)/ Facultad de Veterinaria; Universidad de la República (UdelaR)/ Facultad de Veterinaria; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Sub-fertility in beef cattle: follicle dynamics and progesterone concentration during the estrus cycle. [Resumen de poster]. |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
ln: Encuentro de Investigadores de la Región Noreste: Cerro Largo-Rivera-Tacuarembó, 1., 12 de agosto de 2016, Campus Interinstitucional de Tacuarembó, Tacuarembó. Libro de Resúmenes. Tacuarembó: UDELAR; INIA, 2016. |
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Páginas : |
p. 44 |
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Idioma : |
Español |
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Notas : |
Modalidad: poster. |
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Contenido : |
The repeat breeder syndrome has been characterised in dairy cows, but the experimental model used virgin heifers as controls, which may potentially be sub-fertile. The aim of this study was to characterize the pattern of follicle and corpus luteum (CL) development and progesterone concentrations during the estrus cycle in fertile and sub-fertile adult beef cows. Eleven Hereford cows (fertile n=5; sub-fertile n=6) were used in this experiment. The categories were defined based on their pregnancy rate at 24 and 73 months of age after five services at each age (three by artificial insemination [AI] and two by natural mating) in fertile (pregnant at first AI at two years old, pregnant ≥ 3 times at 73 months of age) and sub-fertile (pregnant at the fourth of fifth service by natural mating or did not got pregnant at 24 months of age and got pregnant one or two times at 73 months of age). At 90 months of age, were synchronized with two intramuscular prostaglandin injections given 14 d apart. The ovarian scanning began on the day of the second PG injection and continued daily for a complete estrous cycle up to d 7 of the following cycle.
Plasma samples were collected daily by jugular venepuncture to determinate progesterone concentrations by RIA. Data were analysed by ANOVA, using the GLM and MIXED procedures in SAS. There were no differences in body weight, body condition or height between fertile and sub-fertile cows. There were no differences between groups in follicular dynamics, area of the CL, number of 2 to 5 mm follicles, total number of follicles, duration of the estrous cycle or interval from estrus to ovulation. However, progesterone concentrations were higher in subfertile (7.58 ± 0.96 ng/ml) than in fertile (5.19 ± 1.08 ng/ml; P<0.01) cows from d 8 to 18 of the cycle. In conclusion, under the conditions in which this experiment was conducted, sub-fertile cows had higher concentrations of progesterone than fertile cows. These findings could be associated with the expression of its receptors in the uterus2 known to affect embryo survival. MenosThe repeat breeder syndrome has been characterised in dairy cows, but the experimental model used virgin heifers as controls, which may potentially be sub-fertile. The aim of this study was to characterize the pattern of follicle and corpus luteum (CL) development and progesterone concentrations during the estrus cycle in fertile and sub-fertile adult beef cows. Eleven Hereford cows (fertile n=5; sub-fertile n=6) were used in this experiment. The categories were defined based on their pregnancy rate at 24 and 73 months of age after five services at each age (three by artificial insemination [AI] and two by natural mating) in fertile (pregnant at first AI at two years old, pregnant ≥ 3 times at 73 months of age) and sub-fertile (pregnant at the fourth of fifth service by natural mating or did not got pregnant at 24 months of age and got pregnant one or two times at 73 months of age). At 90 months of age, were synchronized with two intramuscular prostaglandin injections given 14 d apart. The ovarian scanning began on the day of the second PG injection and continued daily for a complete estrous cycle up to d 7 of the following cycle.
Plasma samples were collected daily by jugular venepuncture to determinate progesterone concentrations by RIA. Data were analysed by ANOVA, using the GLM and MIXED procedures in SAS. There were no differences in body weight, body condition or height between fertile and sub-fertile cows. There were no differences between groups in follicular d... Presentar Todo |
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Palabras claves : |
FOLLICULAR DYNAMICS; SUB-FERTILITY. |
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Thesagro : |
PROGESTERONA. |
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Asunto categoría : |
L53 Fisiología Animal - Reproducción |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/6087/1/pagina-44.pdf
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Marc : |
LEADER 02940naa a2200229 a 4500
001 1055710
005 2016-09-22
008 2016 bl uuuu u00u1 u #d
100 1 $aALVEZ, A.
245 $aSub-fertility in beef cattle$bfollicle dynamics and progesterone concentration during the estrus cycle. [Resumen de poster].$h[electronic resource]
260 $c2016
300 $ap. 44
500 $aModalidad: poster.
520 $aThe repeat breeder syndrome has been characterised in dairy cows, but the experimental model used virgin heifers as controls, which may potentially be sub-fertile. The aim of this study was to characterize the pattern of follicle and corpus luteum (CL) development and progesterone concentrations during the estrus cycle in fertile and sub-fertile adult beef cows. Eleven Hereford cows (fertile n=5; sub-fertile n=6) were used in this experiment. The categories were defined based on their pregnancy rate at 24 and 73 months of age after five services at each age (three by artificial insemination [AI] and two by natural mating) in fertile (pregnant at first AI at two years old, pregnant ≥ 3 times at 73 months of age) and sub-fertile (pregnant at the fourth of fifth service by natural mating or did not got pregnant at 24 months of age and got pregnant one or two times at 73 months of age). At 90 months of age, were synchronized with two intramuscular prostaglandin injections given 14 d apart. The ovarian scanning began on the day of the second PG injection and continued daily for a complete estrous cycle up to d 7 of the following cycle. Plasma samples were collected daily by jugular venepuncture to determinate progesterone concentrations by RIA. Data were analysed by ANOVA, using the GLM and MIXED procedures in SAS. There were no differences in body weight, body condition or height between fertile and sub-fertile cows. There were no differences between groups in follicular dynamics, area of the CL, number of 2 to 5 mm follicles, total number of follicles, duration of the estrous cycle or interval from estrus to ovulation. However, progesterone concentrations were higher in subfertile (7.58 ± 0.96 ng/ml) than in fertile (5.19 ± 1.08 ng/ml; P<0.01) cows from d 8 to 18 of the cycle. In conclusion, under the conditions in which this experiment was conducted, sub-fertile cows had higher concentrations of progesterone than fertile cows. These findings could be associated with the expression of its receptors in the uterus2 known to affect embryo survival.
650 $aPROGESTERONA
653 $aFOLLICULAR DYNAMICS
653 $aSUB-FERTILITY
700 1 $aGUILLEN, S.
700 1 $aSEQUEIRA, M.
700 1 $aMEIKLE, A.
700 1 $aVIÑOLES, C.
773 $tln: Encuentro de Investigadores de la Región Noreste: Cerro Largo-Rivera-Tacuarembó, 1., 12 de agosto de 2016, Campus Interinstitucional de Tacuarembó, Tacuarembó. Libro de Resúmenes. Tacuarembó: UDELAR; INIA, 2016.
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Registro original : |
INIA Tacuarembó (TBO) |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha actual : |
21/02/2014 |
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Actualizado : |
06/06/2019 |
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Tipo de producción científica : |
Documentos |
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Autor : |
MENDEZ, J.; LAVECCHIA, A. |
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Afiliación : |
JULIO HECTOR MENDEZ LONGO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ANDRES PASCUAL LAVECCHIA GONZALEZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Implantación de arroz en siembras convencionales |
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Fecha de publicación : |
2010 |
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Fuente / Imprenta : |
ln: INIA Tacuarembó. Presentación resultados experimentales de arroz Zafra 2009/2010. Tacuarembó (Uruguay): INIA, 2010. |
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Páginas : |
p. 1-9 |
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Serie : |
(INIA Serie Actividades de Difusión ; 612) |
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Idioma : |
Español |
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Contenido : |
Nuestros cultivos de arroz se siembran tradicionalmente con densidades de siembra de 150 a 210 kg de semilla por hectárea. Esto implica una siembra de 600 a 800 semillas por metro cuadrado, llegando a recuperar menos del 50 % en forma de plántulas. Este hecho ha sido de preocupación desde siempre por parte de productores e investigadores, llevándose a cabo numerosos trabajos tratando de mejorar la performance de obtención de plántulas, así se han realizado numerosos ensayos con curasemillas. El establecimiento de plántulas en cultivos a campo, depende de características de las propias semillas y de
propiedades físicas y químicas de suelo donde se realiza la siembra. De parte de la semilla tenemos factores tales como viabilidad (germinación), vigor, sanidad, etc., que pueden condicionar el establecimiento de las plántulas. De parte del suelo podemos indicar, contenido de humedad, temperatura, densidad, Ph, etc. Otros factores como profundidad de siembra, drenaje, etc. pueden incidir en la implantación. El presente trabajo con el objetivo de mejorar la recuperación de la cantidad de semillas sembradas con respecto a las plántulas obtenidas, se realiza un ensayo de tratamientos de semillas y manejo de suelo post-siembra. |
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Palabras claves : |
RICE (ORYZA SATIVA L.). |
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Thesagro : |
ARROZ. |
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Asunto categoría : |
F01 Cultivo |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12781/1/sad-612p43-51.pdf
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Marc : |
LEADER 01819naa a2200181 a 4500
001 1020921
005 2019-06-06
008 2010 bl uuuu u00u1 u #d
100 1 $aMENDEZ, J.
245 $aImplantación de arroz en siembras convencionales
260 $c2010
300 $ap. 1-9
490 $a(INIA Serie Actividades de Difusión ; 612)
520 $aNuestros cultivos de arroz se siembran tradicionalmente con densidades de siembra de 150 a 210 kg de semilla por hectárea. Esto implica una siembra de 600 a 800 semillas por metro cuadrado, llegando a recuperar menos del 50 % en forma de plántulas. Este hecho ha sido de preocupación desde siempre por parte de productores e investigadores, llevándose a cabo numerosos trabajos tratando de mejorar la performance de obtención de plántulas, así se han realizado numerosos ensayos con curasemillas. El establecimiento de plántulas en cultivos a campo, depende de características de las propias semillas y de propiedades físicas y químicas de suelo donde se realiza la siembra. De parte de la semilla tenemos factores tales como viabilidad (germinación), vigor, sanidad, etc., que pueden condicionar el establecimiento de las plántulas. De parte del suelo podemos indicar, contenido de humedad, temperatura, densidad, Ph, etc. Otros factores como profundidad de siembra, drenaje, etc. pueden incidir en la implantación. El presente trabajo con el objetivo de mejorar la recuperación de la cantidad de semillas sembradas con respecto a las plántulas obtenidas, se realiza un ensayo de tratamientos de semillas y manejo de suelo post-siembra.
650 $aARROZ
653 $aRICE (ORYZA SATIVA L.)
700 1 $aLAVECCHIA, A.
773 $tln: INIA Tacuarembó. Presentación resultados experimentales de arroz Zafra 2009/2010. Tacuarembó (Uruguay): INIA, 2010.
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