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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
30/05/2019 |
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Actualizado : |
30/05/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
SANTA CRUZ TORRES, R.; CUSHMAN, R.A.; VIÑOLES, C. |
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Afiliación : |
RODRIGO SANTA CRUZ TORRES, Pasante Programa Nacional de Investigación Producción Carne y Lana, INIA Tacuarembó. Polo Agroforestal, UdelaR, EEBR, Cerro Largo.; R.A. CUSHMAN, USDA, ARS, U.S. Meat Animal Research Center, Clay Center, NE, USA.; CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Antral follicular count is a tool that may allow the selection of more precocious Bradford heifers at weaning. |
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Fecha de publicación : |
2018 |
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Fuente / Imprenta : |
Theriogenology, v. 119, p. 35-42, 2018. |
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DOI : |
10.1016/j.theriogenology.2018.06.010 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 14 November 2017; Received in revised form 6 May 2018; Accepted 17 June 2018; Available online 19 June 2018. |
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Contenido : |
Although antral follicle count is a repeatable parameter across life that is positively associated with fertility, its use at weaning as a tool to discard less fertile heifers has not been extensively evaluated. The hypotheses of this work are: 1) maximum antral follicle count (MAFC) is repeatable between weaning and pre breeding evaluations, allowing selection of more fertile heifers at an early age, 2) heifers with high MAFC have growth and development parameters linked to an earlier puberty and regnancy, 3) MAFC has a positive correlation with AMH concentrations, so that both could be used inter changeably. In this study, Hereford (n ¼ 42 and n ¼ 50) and Braford (n ¼ 40 and n ¼ 50) females were used in years 1 and 2; respectively, in a completely randomized experimental design. Heifers were examined for five to ten days at two different moments (post weaning and pre service), to determine MAFC. The concentrations of Anti müllerian hormone (AMH) were evaluated on the day of MAFC assessment. Growth and development parameters were evaluated post weaning and pre service. The repeatability of MAFC between post weaning and pre service evaluations was poor in three cases (Hereford Year 1 ¼0.36 and 2 ¼ 0.39 and Braford, Year 2 ¼ 0.32) but it was high for Braford in Year 2 (0.72). The AMH repeatability between post weaning and pre service evaluations was high in one case (Braford Year 2 ¼ 0.72) and moderate in the others (Year 1, Hereford ¼ 0.50 and Braford ¼ 0.52 and Year 2, Hereford¼ 0.50). In Year 2, Braford heifers with greater MAFC attained puberty at an earlier age (r2 ¼ 0.129; P ¼ 0.0196). Also, diminished
MAFC corresponded with decreased growth and development, thus less Braford heifers with low MAFC were inseminated (2/16), compared to those with medium (12/17) and high MAFC (7/17; P < 0.01). Moreover, Braford heifers with low AFC had less progesterone in the cycle post insemination but pregnancy rate was not affected. In Braford heifers in Year 2, there was a high correlation between MAFC and AMH concentrations (0.85 P < 0.001). The results of these experiments indicate that post weaning MAFC and AMH concentrations may be applied to select those Braford heifers that attain puberty at an early age, but these tools are not useful in Hereford heifers. MenosAlthough antral follicle count is a repeatable parameter across life that is positively associated with fertility, its use at weaning as a tool to discard less fertile heifers has not been extensively evaluated. The hypotheses of this work are: 1) maximum antral follicle count (MAFC) is repeatable between weaning and pre breeding evaluations, allowing selection of more fertile heifers at an early age, 2) heifers with high MAFC have growth and development parameters linked to an earlier puberty and regnancy, 3) MAFC has a positive correlation with AMH concentrations, so that both could be used inter changeably. In this study, Hereford (n ¼ 42 and n ¼ 50) and Braford (n ¼ 40 and n ¼ 50) females were used in years 1 and 2; respectively, in a completely randomized experimental design. Heifers were examined for five to ten days at two different moments (post weaning and pre service), to determine MAFC. The concentrations of Anti müllerian hormone (AMH) were evaluated on the day of MAFC assessment. Growth and development parameters were evaluated post weaning and pre service. The repeatability of MAFC between post weaning and pre service evaluations was poor in three cases (Hereford Year 1 ¼0.36 and 2 ¼ 0.39 and Braford, Year 2 ¼ 0.32) but it was high for Braford in Year 2 (0.72). The AMH repeatability between post weaning and pre service evaluations was high in one case (Braford Year 2 ¼ 0.72) and moderate in the others (Year 1, Hereford ¼ 0.50 and Braford ¼ 0.52 and Year 2, Here... Presentar Todo |
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Palabras claves : |
ANTI MÜLLERIAN HORMONE; BEEF HEIFERS; FERTILITY; PUBERTY; REPLAEMENT SELECTION. |
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Asunto categoría : |
L01 Ganadería |
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Marc : |
LEADER 03134naa a2200229 a 4500
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008 2018 bl uuuu u00u1 u #d
024 7 $a10.1016/j.theriogenology.2018.06.010$2DOI
100 1 $aSANTA CRUZ TORRES, R.
245 $aAntral follicular count is a tool that may allow the selection of more precocious Bradford heifers at weaning.$h[electronic resource]
260 $c2018
500 $aArticle history: Received 14 November 2017; Received in revised form 6 May 2018; Accepted 17 June 2018; Available online 19 June 2018.
520 $aAlthough antral follicle count is a repeatable parameter across life that is positively associated with fertility, its use at weaning as a tool to discard less fertile heifers has not been extensively evaluated. The hypotheses of this work are: 1) maximum antral follicle count (MAFC) is repeatable between weaning and pre breeding evaluations, allowing selection of more fertile heifers at an early age, 2) heifers with high MAFC have growth and development parameters linked to an earlier puberty and regnancy, 3) MAFC has a positive correlation with AMH concentrations, so that both could be used inter changeably. In this study, Hereford (n ¼ 42 and n ¼ 50) and Braford (n ¼ 40 and n ¼ 50) females were used in years 1 and 2; respectively, in a completely randomized experimental design. Heifers were examined for five to ten days at two different moments (post weaning and pre service), to determine MAFC. The concentrations of Anti müllerian hormone (AMH) were evaluated on the day of MAFC assessment. Growth and development parameters were evaluated post weaning and pre service. The repeatability of MAFC between post weaning and pre service evaluations was poor in three cases (Hereford Year 1 ¼0.36 and 2 ¼ 0.39 and Braford, Year 2 ¼ 0.32) but it was high for Braford in Year 2 (0.72). The AMH repeatability between post weaning and pre service evaluations was high in one case (Braford Year 2 ¼ 0.72) and moderate in the others (Year 1, Hereford ¼ 0.50 and Braford ¼ 0.52 and Year 2, Hereford¼ 0.50). In Year 2, Braford heifers with greater MAFC attained puberty at an earlier age (r2 ¼ 0.129; P ¼ 0.0196). Also, diminished MAFC corresponded with decreased growth and development, thus less Braford heifers with low MAFC were inseminated (2/16), compared to those with medium (12/17) and high MAFC (7/17; P < 0.01). Moreover, Braford heifers with low AFC had less progesterone in the cycle post insemination but pregnancy rate was not affected. In Braford heifers in Year 2, there was a high correlation between MAFC and AMH concentrations (0.85 P < 0.001). The results of these experiments indicate that post weaning MAFC and AMH concentrations may be applied to select those Braford heifers that attain puberty at an early age, but these tools are not useful in Hereford heifers.
653 $aANTI MÜLLERIAN HORMONE
653 $aBEEF HEIFERS
653 $aFERTILITY
653 $aPUBERTY
653 $aREPLAEMENT SELECTION
700 1 $aCUSHMAN, R.A.
700 1 $aVIÑOLES, C.
773 $tTheriogenology$gv. 119, p. 35-42, 2018.
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Registro original : |
INIA Tacuarembó (TBO) |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas; INIA Tacuarembó. |
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Fecha actual : |
28/03/2016 |
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Actualizado : |
21/10/2019 |
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Tipo de producción científica : |
Revista INIA |
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Autor : |
INIA (INSTITUTO NACIONAL DE INVESTIGACIÓN AGROPECUARIA) |
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Título : |
Revista INIA Uruguay. (No.44, Marzo 2016). |
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Fecha de publicación : |
2016 |
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Fuente / Imprenta : |
Montevideo, UY: INIA, 2016. |
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Páginas : |
60 p. |
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Serie : |
(Revista INIA; 44) |
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ISSN : |
1510-9011 |
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Idioma : |
Español |
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Thesagro : |
ARROZ; BIOTECNOLOGIA; BOVINOS DE CARNE; CAMBIO CLIMATICO; CIENCIA; CITRUS; CLIMA; CLIMATOLOGIA; COMUNICACION; CONTROL DE ENFERMEDADES; CULTIVO; CULTIVOS DE GRANO; CULTIVOS DE SECANO; ENTOMOLOGIA; ESPECIES FORRAJERAS; EUCALIPTUS; EXPLOTACION AGRICOLA FAMILIAR; FITOPATOLOGIA; FORESTALES; FORRAJES; FRUTALES; FRUTICULTURA; GANADO BOVINO; GRANOS; GRAS; HORTALIZAS; HORTICULTURA; INIA; INNOVACION; INVESTIGACION; LECHERIA; LEGUMINOSAS FORRAJERAS; MANEJO DE CULTIVOS; MEJORAMIENTO ANIMAL; METEOROLOGIA; MICROBIOLOGIA; OVINOS; PASTURAS; PRODUCCION ANIMAL; PRODUCCION DE LANA; PRODUCCION LECHERA; REVISTA INIA 2016; SEMILLAS; SOJA; SUELOS; SUINOS; SUSTENTABILIDAD AMBIENTAL; TECNOLOGIA; TRANSFERENCIA DE TECNOLOGÍA; VARIEDADES; VITICULTURA. |
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Asunto categoría : |
A50 Investigación agraria |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/5571/1/revista-INIA-44.pdf
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Marc : |
LEADER 01880nam a2200745 a 4500
001 1054518
005 2019-10-21
008 2016 bl uuuu u00u1 u #d
022 $a1510-9011
100 1 $aINIA (INSTITUTO NACIONAL DE INVESTIGACIÓN AGROPECUARIA)
245 $aRevista INIA Uruguay. (No.44, Marzo 2016).
260 $aMontevideo, UY: INIA$c2016
300 $a60 p.
490 $a(Revista INIA; 44)
650 $aARROZ
650 $aBIOTECNOLOGIA
650 $aBOVINOS DE CARNE
650 $aCAMBIO CLIMATICO
650 $aCIENCIA
650 $aCITRUS
650 $aCLIMA
650 $aCLIMATOLOGIA
650 $aCOMUNICACION
650 $aCONTROL DE ENFERMEDADES
650 $aCULTIVO
650 $aCULTIVOS DE GRANO
650 $aCULTIVOS DE SECANO
650 $aENTOMOLOGIA
650 $aESPECIES FORRAJERAS
650 $aEUCALIPTUS
650 $aEXPLOTACION AGRICOLA FAMILIAR
650 $aFITOPATOLOGIA
650 $aFORESTALES
650 $aFORRAJES
650 $aFRUTALES
650 $aFRUTICULTURA
650 $aGANADO BOVINO
650 $aGRANOS
650 $aGRAS
650 $aHORTALIZAS
650 $aHORTICULTURA
650 $aINIA
650 $aINNOVACION
650 $aINVESTIGACION
650 $aLECHERIA
650 $aLEGUMINOSAS FORRAJERAS
650 $aMANEJO DE CULTIVOS
650 $aMEJORAMIENTO ANIMAL
650 $aMETEOROLOGIA
650 $aMICROBIOLOGIA
650 $aOVINOS
650 $aPASTURAS
650 $aPRODUCCION ANIMAL
650 $aPRODUCCION DE LANA
650 $aPRODUCCION LECHERA
650 $aREVISTA INIA 2016
650 $aSEMILLAS
650 $aSOJA
650 $aSUELOS
650 $aSUINOS
650 $aSUSTENTABILIDAD AMBIENTAL
650 $aTECNOLOGIA
650 $aTRANSFERENCIA DE TECNOLOGÍA
650 $aVARIEDADES
650 $aVITICULTURA
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INIA Las Brujas (LB) |
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