Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle
- Autores
- Bonamy, Martin; de Iraola, Julieta Josefina; Baldo, Andres; Prando, Alberto José; Giovambattista, Guillermo; Munilla Leguizamon, Sebastian
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- In cow-calf operations the moment the heifer achieves her first pregnancy set up her future productivity. Although puberty itself is a yes-or-no condition, time to the event has a quantitative genetic basis and thus is suitable for genetic selection. However, the trait is difficult to measure directly and proxies such as age at first calving (AFC), or scrotal circumference (SC), are typically used. In genetic evaluations, the age at which SC is measured usually corresponds to last part of pubertal development phase. But given that initiation of puberty in both sexes is controlled by the same neuroendocrine mechanisms, we argue that an earlier measurement, taken instead at the start of the pubertal development phase, is probably a better indicator of female precocity. To support the hypothesis, we fitted a multiple-trait animal model on AFC records and SC measurements taken at 300, 400, and 630 days of age and estimated heritabilities and genetic correlations by REML. Importantly, usually AFC data is afflicted by the problem that when breeding season starts most heifers are already cycling (which is, of course, the desired condition) and thus the record poorly reflects precocity. To avoid the problem, in this study we used records collected from an Angus herd in which heifers receive an early natural first service at 375 days of age. Genetic correlation between AFC and SC300 was twice as large as the one corresponding to SC400 (–0.478 ± 0.13 vs –0.244 ± 0.11) and three times larger than to SC630 (–0.478 ± 0.13 vs –0.152 ± 0.12), a result that supports our hypothesis. Heritabilities for SC300, SC400 and SC630 were 0.429 ± 0.07, 0.704 ± 0.07 and 0.576 ± 0.08, respectively, and 0.371 ± 0.05 for AFC. Our results have an important implication in the age at which SC, as an indirect trait for improving precocity, is typically measured in beef cattle breeding programs. Indeed, they indicate that measurements should be taken earlier.
Fil: Bonamy, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina
Fil: de Iraola, Julieta Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina
Fil: Baldo, Andres. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina
Fil: Prando, Alberto José. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina
Fil: Giovambattista, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina
Fil: Munilla Leguizamon, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal; Argentina - Materia
-
AGE AT FIRST CALVING
ANGUS
HEIFER
PUBERTY
SCROTAL CIRCUMFERENCE - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/83899
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Early rather than late scrotal circumference measurements better reflect female precocity in beef cattleBonamy, Martinde Iraola, Julieta JosefinaBaldo, AndresPrando, Alberto JoséGiovambattista, GuillermoMunilla Leguizamon, SebastianAGE AT FIRST CALVINGANGUSHEIFERPUBERTYSCROTAL CIRCUMFERENCEhttps://purl.org/becyt/ford/4.2https://purl.org/becyt/ford/4In cow-calf operations the moment the heifer achieves her first pregnancy set up her future productivity. Although puberty itself is a yes-or-no condition, time to the event has a quantitative genetic basis and thus is suitable for genetic selection. However, the trait is difficult to measure directly and proxies such as age at first calving (AFC), or scrotal circumference (SC), are typically used. In genetic evaluations, the age at which SC is measured usually corresponds to last part of pubertal development phase. But given that initiation of puberty in both sexes is controlled by the same neuroendocrine mechanisms, we argue that an earlier measurement, taken instead at the start of the pubertal development phase, is probably a better indicator of female precocity. To support the hypothesis, we fitted a multiple-trait animal model on AFC records and SC measurements taken at 300, 400, and 630 days of age and estimated heritabilities and genetic correlations by REML. Importantly, usually AFC data is afflicted by the problem that when breeding season starts most heifers are already cycling (which is, of course, the desired condition) and thus the record poorly reflects precocity. To avoid the problem, in this study we used records collected from an Angus herd in which heifers receive an early natural first service at 375 days of age. Genetic correlation between AFC and SC300 was twice as large as the one corresponding to SC400 (–0.478 ± 0.13 vs –0.244 ± 0.11) and three times larger than to SC630 (–0.478 ± 0.13 vs –0.152 ± 0.12), a result that supports our hypothesis. Heritabilities for SC300, SC400 and SC630 were 0.429 ± 0.07, 0.704 ± 0.07 and 0.576 ± 0.08, respectively, and 0.371 ± 0.05 for AFC. Our results have an important implication in the age at which SC, as an indirect trait for improving precocity, is typically measured in beef cattle breeding programs. Indeed, they indicate that measurements should be taken earlier.Fil: Bonamy, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: de Iraola, Julieta Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Baldo, Andres. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Prando, Alberto José. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; ArgentinaFil: Giovambattista, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; ArgentinaFil: Munilla Leguizamon, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal; ArgentinaElsevier Science2018-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/83899Bonamy, Martin; de Iraola, Julieta Josefina; Baldo, Andres; Prando, Alberto José; Giovambattista, Guillermo; et al.; Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle; Elsevier Science; Livestock Science; 218; 12-2018; 79-841871-1413CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1871141318306024info:eu-repo/semantics/altIdentifier/doi/10.1016/j.livsci.2018.10.019info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:37:19Zoai:ri.conicet.gov.ar:11336/83899instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:37:19.307CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
title |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
spellingShingle |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle Bonamy, Martin AGE AT FIRST CALVING ANGUS HEIFER PUBERTY SCROTAL CIRCUMFERENCE |
title_short |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
title_full |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
title_fullStr |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
title_full_unstemmed |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
title_sort |
Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle |
dc.creator.none.fl_str_mv |
Bonamy, Martin de Iraola, Julieta Josefina Baldo, Andres Prando, Alberto José Giovambattista, Guillermo Munilla Leguizamon, Sebastian |
author |
Bonamy, Martin |
author_facet |
Bonamy, Martin de Iraola, Julieta Josefina Baldo, Andres Prando, Alberto José Giovambattista, Guillermo Munilla Leguizamon, Sebastian |
author_role |
author |
author2 |
de Iraola, Julieta Josefina Baldo, Andres Prando, Alberto José Giovambattista, Guillermo Munilla Leguizamon, Sebastian |
author2_role |
author author author author author |
dc.subject.none.fl_str_mv |
AGE AT FIRST CALVING ANGUS HEIFER PUBERTY SCROTAL CIRCUMFERENCE |
topic |
AGE AT FIRST CALVING ANGUS HEIFER PUBERTY SCROTAL CIRCUMFERENCE |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/4.2 https://purl.org/becyt/ford/4 |
dc.description.none.fl_txt_mv |
In cow-calf operations the moment the heifer achieves her first pregnancy set up her future productivity. Although puberty itself is a yes-or-no condition, time to the event has a quantitative genetic basis and thus is suitable for genetic selection. However, the trait is difficult to measure directly and proxies such as age at first calving (AFC), or scrotal circumference (SC), are typically used. In genetic evaluations, the age at which SC is measured usually corresponds to last part of pubertal development phase. But given that initiation of puberty in both sexes is controlled by the same neuroendocrine mechanisms, we argue that an earlier measurement, taken instead at the start of the pubertal development phase, is probably a better indicator of female precocity. To support the hypothesis, we fitted a multiple-trait animal model on AFC records and SC measurements taken at 300, 400, and 630 days of age and estimated heritabilities and genetic correlations by REML. Importantly, usually AFC data is afflicted by the problem that when breeding season starts most heifers are already cycling (which is, of course, the desired condition) and thus the record poorly reflects precocity. To avoid the problem, in this study we used records collected from an Angus herd in which heifers receive an early natural first service at 375 days of age. Genetic correlation between AFC and SC300 was twice as large as the one corresponding to SC400 (–0.478 ± 0.13 vs –0.244 ± 0.11) and three times larger than to SC630 (–0.478 ± 0.13 vs –0.152 ± 0.12), a result that supports our hypothesis. Heritabilities for SC300, SC400 and SC630 were 0.429 ± 0.07, 0.704 ± 0.07 and 0.576 ± 0.08, respectively, and 0.371 ± 0.05 for AFC. Our results have an important implication in the age at which SC, as an indirect trait for improving precocity, is typically measured in beef cattle breeding programs. Indeed, they indicate that measurements should be taken earlier. Fil: Bonamy, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina Fil: de Iraola, Julieta Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina Fil: Baldo, Andres. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina Fil: Prando, Alberto José. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias; Argentina Fil: Giovambattista, Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina Fil: Munilla Leguizamon, Sebastian. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET- La Plata. Instituto de Genética Veterinaria "Ing. Fernando Noel Dulout". Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Instituto de Genética Veterinaria; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal; Argentina |
description |
In cow-calf operations the moment the heifer achieves her first pregnancy set up her future productivity. Although puberty itself is a yes-or-no condition, time to the event has a quantitative genetic basis and thus is suitable for genetic selection. However, the trait is difficult to measure directly and proxies such as age at first calving (AFC), or scrotal circumference (SC), are typically used. In genetic evaluations, the age at which SC is measured usually corresponds to last part of pubertal development phase. But given that initiation of puberty in both sexes is controlled by the same neuroendocrine mechanisms, we argue that an earlier measurement, taken instead at the start of the pubertal development phase, is probably a better indicator of female precocity. To support the hypothesis, we fitted a multiple-trait animal model on AFC records and SC measurements taken at 300, 400, and 630 days of age and estimated heritabilities and genetic correlations by REML. Importantly, usually AFC data is afflicted by the problem that when breeding season starts most heifers are already cycling (which is, of course, the desired condition) and thus the record poorly reflects precocity. To avoid the problem, in this study we used records collected from an Angus herd in which heifers receive an early natural first service at 375 days of age. Genetic correlation between AFC and SC300 was twice as large as the one corresponding to SC400 (–0.478 ± 0.13 vs –0.244 ± 0.11) and three times larger than to SC630 (–0.478 ± 0.13 vs –0.152 ± 0.12), a result that supports our hypothesis. Heritabilities for SC300, SC400 and SC630 were 0.429 ± 0.07, 0.704 ± 0.07 and 0.576 ± 0.08, respectively, and 0.371 ± 0.05 for AFC. Our results have an important implication in the age at which SC, as an indirect trait for improving precocity, is typically measured in beef cattle breeding programs. Indeed, they indicate that measurements should be taken earlier. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/83899 Bonamy, Martin; de Iraola, Julieta Josefina; Baldo, Andres; Prando, Alberto José; Giovambattista, Guillermo; et al.; Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle; Elsevier Science; Livestock Science; 218; 12-2018; 79-84 1871-1413 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/83899 |
identifier_str_mv |
Bonamy, Martin; de Iraola, Julieta Josefina; Baldo, Andres; Prando, Alberto José; Giovambattista, Guillermo; et al.; Early rather than late scrotal circumference measurements better reflect female precocity in beef cattle; Elsevier Science; Livestock Science; 218; 12-2018; 79-84 1871-1413 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1871141318306024 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.livsci.2018.10.019 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science |
publisher.none.fl_str_mv |
Elsevier Science |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613175334404096 |
score |
13.070432 |