Criterios de selección por fertilidad de la hembra en bovinos para carne

Autores
Pardo, Alan Maxs
Año de publicación
2017
Idioma
español castellano
Tipo de recurso
tesis de maestría
Estado
versión aceptada
Colaborador/a o director/a de tesis
Melucci, Lilia Magdalena
Descripción
Tesis de maestría para obtener el grado de Magister Scientiae en Sanidad Animal presentada en la Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata en Junio de 2017
El objetivo de este estudio fue identificar criterios de selección para mejorar la aptitud reproductiva de la hembra bovina. Para ello se realizaron estudios de pubertad en vaquillonas, y productividad media anual en vacas. El espesor de grasa dorsal medido por ultrasonografía a los 450 días de edad (15 meses) resultó un buen predictor de la edad a la pubertad y un criterio de selección potencialmente utilizable para mejorar la fertilidad de la hembra. La selección por precocidad sexual brindaría la posibilidad de mejorar la productividad media anual de las vacas y de esta manera la fertilidad del rodeo.
In order to identify selection criteria to improve the reproductive capacity of the female bovine, we studied 132 heifers born in 2011 and 2012, belonging to 5 genetic groups (GG): Angus (A), Hereford (H), AH, HA and Creole (C) in two years (Trials 1 and 2). After weaning, the presence of corpus luteum, live weight, body condition, rump height, rump fat thickness, rib fat thickness and rib eye area were recorded every 28 days. By DNA analysis we determined the genotype for a total of 70 SNPs of genes involved in the hypothalamic-gonadal metabolic pathways, growth and fat metabolism. On the other hand, in order to evaluate the relationships between the beginning of the reproductive life of the females and their productive efficiency, the annual records of 895 cows (217 A, 253 H, 125 C, 116 AH y 184 HA) born between 1986 and 2009 in Experimental Unit Nº 7 - EEA INTA Balcarce were analyzed to estimate the average annual productivity of the cow (PRODAM), its components of (Co) variance and breeding values (EBV). The environmental differences between the two trials evaluated conditioned the age at which the heifers reached puberty, which was higher in those who had lower postweaning gains. HA heifers reached puberty 54±15 days before C (p <0.05), while the rest of GG did not show differences between themselves (p> 0.05). The rib fat thickness measured by ultrasonography at 450 days of age (15 months) was a good predictor of age at puberty and consequently a selection criterion potentially useful to improve the fertility of the female. Estimation of (co)variance components for PRODAM showed a heritability of 0.14±0.05. Age at puberty of the evaluated heifers was associated with the average annual productivity of their mothers, which would be a good predictor of the productive performance of cows. SNPs in SPAG11 and PTGER2 showed a certain association with age, weight and height at puberty. From the analysis performed, the nutritional conditions immediately after weaning are of vital importance for an earlier presence of the first corpus luteum, an indicator of puberty. The rib fat thickness in the heifers could be used as a selection criterion for sexual precocity. However, it is important for future studies to analyze in more detail the relationship between fat deposition dynamics and the onset of puberty, in order to determine the existence of critical thresholds (minimum and maximum) for the onset of reproductive activity. Selection for sexual precocity provides an opportunity to improve the annual average productivity of cows and thus cattle fertility. At the molecular level, the associations found among the genotypes of the SNPs evaluated should be validated in populations with a larger number of animals before being identified as selection criteria to increase the female fertility
EEA Balcarce
Fil: Pardo, Alan Maxs. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación experimental Agropecuaria Balcarce; Argentina
Materia
Bovina
Ganado de Carne
Selección
Selection
Fertilidad
Cattle
Beef Cattle
Fertility
Bovinae
Cows
Reproductive Behaviour
Vaca
Comportamiento Reproductivo
Eficiencia Productiva
Productive Efficiency
Single Nucleotide Polymorphysm
SNP
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/5195

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oai_identifier_str oai:localhost:20.500.12123/5195
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spelling Criterios de selección por fertilidad de la hembra en bovinos para carnePardo, Alan MaxsBovinaGanado de CarneSelecciónSelectionFertilidadCattleBeef CattleFertilityBovinaeCowsReproductive BehaviourVacaComportamiento ReproductivoEficiencia ProductivaProductive EfficiencySingle Nucleotide PolymorphysmSNPTesis de maestría para obtener el grado de Magister Scientiae en Sanidad Animal presentada en la Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata en Junio de 2017El objetivo de este estudio fue identificar criterios de selección para mejorar la aptitud reproductiva de la hembra bovina. Para ello se realizaron estudios de pubertad en vaquillonas, y productividad media anual en vacas. El espesor de grasa dorsal medido por ultrasonografía a los 450 días de edad (15 meses) resultó un buen predictor de la edad a la pubertad y un criterio de selección potencialmente utilizable para mejorar la fertilidad de la hembra. La selección por precocidad sexual brindaría la posibilidad de mejorar la productividad media anual de las vacas y de esta manera la fertilidad del rodeo.In order to identify selection criteria to improve the reproductive capacity of the female bovine, we studied 132 heifers born in 2011 and 2012, belonging to 5 genetic groups (GG): Angus (A), Hereford (H), AH, HA and Creole (C) in two years (Trials 1 and 2). After weaning, the presence of corpus luteum, live weight, body condition, rump height, rump fat thickness, rib fat thickness and rib eye area were recorded every 28 days. By DNA analysis we determined the genotype for a total of 70 SNPs of genes involved in the hypothalamic-gonadal metabolic pathways, growth and fat metabolism. On the other hand, in order to evaluate the relationships between the beginning of the reproductive life of the females and their productive efficiency, the annual records of 895 cows (217 A, 253 H, 125 C, 116 AH y 184 HA) born between 1986 and 2009 in Experimental Unit Nº 7 - EEA INTA Balcarce were analyzed to estimate the average annual productivity of the cow (PRODAM), its components of (Co) variance and breeding values (EBV). The environmental differences between the two trials evaluated conditioned the age at which the heifers reached puberty, which was higher in those who had lower postweaning gains. HA heifers reached puberty 54±15 days before C (p <0.05), while the rest of GG did not show differences between themselves (p> 0.05). The rib fat thickness measured by ultrasonography at 450 days of age (15 months) was a good predictor of age at puberty and consequently a selection criterion potentially useful to improve the fertility of the female. Estimation of (co)variance components for PRODAM showed a heritability of 0.14±0.05. Age at puberty of the evaluated heifers was associated with the average annual productivity of their mothers, which would be a good predictor of the productive performance of cows. SNPs in SPAG11 and PTGER2 showed a certain association with age, weight and height at puberty. From the analysis performed, the nutritional conditions immediately after weaning are of vital importance for an earlier presence of the first corpus luteum, an indicator of puberty. The rib fat thickness in the heifers could be used as a selection criterion for sexual precocity. However, it is important for future studies to analyze in more detail the relationship between fat deposition dynamics and the onset of puberty, in order to determine the existence of critical thresholds (minimum and maximum) for the onset of reproductive activity. Selection for sexual precocity provides an opportunity to improve the annual average productivity of cows and thus cattle fertility. At the molecular level, the associations found among the genotypes of the SNPs evaluated should be validated in populations with a larger number of animals before being identified as selection criteria to increase the female fertilityEEA BalcarceFil: Pardo, Alan Maxs. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación experimental Agropecuaria Balcarce; ArgentinaUniversidad Nacional de Mar del Plata , Facultad de Ciencias AgrariasMelucci, Lilia Magdalena2019-05-23T17:50:13Z2019-05-23T17:50:13Z2017-06info:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_bdccinfo:ar-repo/semantics/tesisDeMaestriaapplication/pdfhttp://hdl.handle.net/20.500.12123/5195http://intrabalc.inta.gob.ar/dbtw-wpd/images/Pardo-A-M.pdfspainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuaria2025-09-29T13:44:40Zoai:localhost:20.500.12123/5195instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:40.959INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Criterios de selección por fertilidad de la hembra en bovinos para carne
title Criterios de selección por fertilidad de la hembra en bovinos para carne
spellingShingle Criterios de selección por fertilidad de la hembra en bovinos para carne
Pardo, Alan Maxs
Bovina
Ganado de Carne
Selección
Selection
Fertilidad
Cattle
Beef Cattle
Fertility
Bovinae
Cows
Reproductive Behaviour
Vaca
Comportamiento Reproductivo
Eficiencia Productiva
Productive Efficiency
Single Nucleotide Polymorphysm
SNP
title_short Criterios de selección por fertilidad de la hembra en bovinos para carne
title_full Criterios de selección por fertilidad de la hembra en bovinos para carne
title_fullStr Criterios de selección por fertilidad de la hembra en bovinos para carne
title_full_unstemmed Criterios de selección por fertilidad de la hembra en bovinos para carne
title_sort Criterios de selección por fertilidad de la hembra en bovinos para carne
dc.creator.none.fl_str_mv Pardo, Alan Maxs
author Pardo, Alan Maxs
author_facet Pardo, Alan Maxs
author_role author
dc.contributor.none.fl_str_mv Melucci, Lilia Magdalena
dc.subject.none.fl_str_mv Bovina
Ganado de Carne
Selección
Selection
Fertilidad
Cattle
Beef Cattle
Fertility
Bovinae
Cows
Reproductive Behaviour
Vaca
Comportamiento Reproductivo
Eficiencia Productiva
Productive Efficiency
Single Nucleotide Polymorphysm
SNP
topic Bovina
Ganado de Carne
Selección
Selection
Fertilidad
Cattle
Beef Cattle
Fertility
Bovinae
Cows
Reproductive Behaviour
Vaca
Comportamiento Reproductivo
Eficiencia Productiva
Productive Efficiency
Single Nucleotide Polymorphysm
SNP
dc.description.none.fl_txt_mv Tesis de maestría para obtener el grado de Magister Scientiae en Sanidad Animal presentada en la Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata en Junio de 2017
El objetivo de este estudio fue identificar criterios de selección para mejorar la aptitud reproductiva de la hembra bovina. Para ello se realizaron estudios de pubertad en vaquillonas, y productividad media anual en vacas. El espesor de grasa dorsal medido por ultrasonografía a los 450 días de edad (15 meses) resultó un buen predictor de la edad a la pubertad y un criterio de selección potencialmente utilizable para mejorar la fertilidad de la hembra. La selección por precocidad sexual brindaría la posibilidad de mejorar la productividad media anual de las vacas y de esta manera la fertilidad del rodeo.
In order to identify selection criteria to improve the reproductive capacity of the female bovine, we studied 132 heifers born in 2011 and 2012, belonging to 5 genetic groups (GG): Angus (A), Hereford (H), AH, HA and Creole (C) in two years (Trials 1 and 2). After weaning, the presence of corpus luteum, live weight, body condition, rump height, rump fat thickness, rib fat thickness and rib eye area were recorded every 28 days. By DNA analysis we determined the genotype for a total of 70 SNPs of genes involved in the hypothalamic-gonadal metabolic pathways, growth and fat metabolism. On the other hand, in order to evaluate the relationships between the beginning of the reproductive life of the females and their productive efficiency, the annual records of 895 cows (217 A, 253 H, 125 C, 116 AH y 184 HA) born between 1986 and 2009 in Experimental Unit Nº 7 - EEA INTA Balcarce were analyzed to estimate the average annual productivity of the cow (PRODAM), its components of (Co) variance and breeding values (EBV). The environmental differences between the two trials evaluated conditioned the age at which the heifers reached puberty, which was higher in those who had lower postweaning gains. HA heifers reached puberty 54±15 days before C (p <0.05), while the rest of GG did not show differences between themselves (p> 0.05). The rib fat thickness measured by ultrasonography at 450 days of age (15 months) was a good predictor of age at puberty and consequently a selection criterion potentially useful to improve the fertility of the female. Estimation of (co)variance components for PRODAM showed a heritability of 0.14±0.05. Age at puberty of the evaluated heifers was associated with the average annual productivity of their mothers, which would be a good predictor of the productive performance of cows. SNPs in SPAG11 and PTGER2 showed a certain association with age, weight and height at puberty. From the analysis performed, the nutritional conditions immediately after weaning are of vital importance for an earlier presence of the first corpus luteum, an indicator of puberty. The rib fat thickness in the heifers could be used as a selection criterion for sexual precocity. However, it is important for future studies to analyze in more detail the relationship between fat deposition dynamics and the onset of puberty, in order to determine the existence of critical thresholds (minimum and maximum) for the onset of reproductive activity. Selection for sexual precocity provides an opportunity to improve the annual average productivity of cows and thus cattle fertility. At the molecular level, the associations found among the genotypes of the SNPs evaluated should be validated in populations with a larger number of animals before being identified as selection criteria to increase the female fertility
EEA Balcarce
Fil: Pardo, Alan Maxs. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación experimental Agropecuaria Balcarce; Argentina
description Tesis de maestría para obtener el grado de Magister Scientiae en Sanidad Animal presentada en la Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata en Junio de 2017
publishDate 2017
dc.date.none.fl_str_mv 2017-06
2019-05-23T17:50:13Z
2019-05-23T17:50:13Z
dc.type.none.fl_str_mv info:eu-repo/semantics/masterThesis
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_bdcc
info:ar-repo/semantics/tesisDeMaestria
format masterThesis
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/5195
http://intrabalc.inta.gob.ar/dbtw-wpd/images/Pardo-A-M.pdf
url http://hdl.handle.net/20.500.12123/5195
http://intrabalc.inta.gob.ar/dbtw-wpd/images/Pardo-A-M.pdf
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional de Mar del Plata , Facultad de Ciencias Agrarias
publisher.none.fl_str_mv Universidad Nacional de Mar del Plata , Facultad de Ciencias Agrarias
dc.source.none.fl_str_mv reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
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