An insight into population structure and genetic progress of Argentinean Holstein cattle
The objective of the present study was to investigate the most critical issues associated with the limited genetic progress evidenced in the Argentinean Holstein (“Holando Argentino”) breed in the last 20 years (only 26% of the phenotypic trend in milk yield was due to genetics). The study comprised...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2023
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/14343 https://onlinelibrary.wiley.com/doi/10.1111/jbg.12766 https://doi.org/10.1111/jbg.12766 |
| _version_ | 1855485344468697088 |
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| author | Pardo, Alan Maxs Casanova, Daniel Rubio, Natalia Andere, Cecilia Rodríguez, Edgardo Corva, Pablo |
| author_browse | Andere, Cecilia Casanova, Daniel Corva, Pablo Pardo, Alan Maxs Rodríguez, Edgardo Rubio, Natalia |
| author_facet | Pardo, Alan Maxs Casanova, Daniel Rubio, Natalia Andere, Cecilia Rodríguez, Edgardo Corva, Pablo |
| author_sort | Pardo, Alan Maxs |
| collection | INTA Digital |
| description | The objective of the present study was to investigate the most critical issues associated with the limited genetic progress evidenced in the Argentinean Holstein (“Holando Argentino”) breed in the last 20 years (only 26% of the phenotypic trend in milk yield was due to genetics). The study comprised the analysis of population structure, realized genetic selection differentials, genetic progress and partition of genetic trends by sex and country of origin from 1936 to 2019 (1,045,582 records; 24,680 sires and 619,322 dams in the pedigree). Average inbreeding steadily increased in the last 15 generations (ΔF = 0.6%, which translates to Ne = 75). Partition of genetic trends revealed that local genetics made a negligible contribution to genetic progress, which for most traits was highly dependent on imported genetics (>80%). Mean generation intervals were fairly constant until 2009 (8–9 years for males and 5–6 years for females, respectively) and then decreased, especially in the paths of sires of bulls and dams of bulls (to 5 and 4 years, respectively) mostly due to the influence of imported sires. The reduction in generation intervals was counterbalanced by a marked deterioration of realized selection differentials, particularly in the path of sires of bulls that nevertheless made the largest contribution to genetic progress. In the last 20 years, realized selection differentials in this path went from 533.6 to 170.8 kg for milk yield and from 16.7 to 13.3 kg for protein yield (1.7–0.5 and 1.6–1.3 standard deviation units, respectively). Among all considered traits (milk yield, fat yield, protein yield, stature, final score and daughter pregnancy rate) in the analysed period, annual genetic gain was negative for milk yield, fairly constant for composition and conformation traits, and positive only in the case of daughter pregnancy rate. Considered together, these results suggest that limited genetic progress is due to the absence of a sound breeding programme that includes genomic selection and a carefully defined selection objective, together with the absence of stronger regulations in germplasm importation; however, other factors such as potential genetics by environment interactions cannot be ruled out. |
| format | Artículo |
| id | INTA14343 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA143432023-03-28T18:31:41Z An insight into population structure and genetic progress of Argentinean Holstein cattle Pardo, Alan Maxs Casanova, Daniel Rubio, Natalia Andere, Cecilia Rodríguez, Edgardo Corva, Pablo Ganado Bovino Razas (animales) Endogomia Pedigrí Respuesta a la Selección Cattle Breeds (animals) Inbreeding Pedigree Livestock Selecction Resposes Raza Holando Argentino Raza Holstein The objective of the present study was to investigate the most critical issues associated with the limited genetic progress evidenced in the Argentinean Holstein (“Holando Argentino”) breed in the last 20 years (only 26% of the phenotypic trend in milk yield was due to genetics). The study comprised the analysis of population structure, realized genetic selection differentials, genetic progress and partition of genetic trends by sex and country of origin from 1936 to 2019 (1,045,582 records; 24,680 sires and 619,322 dams in the pedigree). Average inbreeding steadily increased in the last 15 generations (ΔF = 0.6%, which translates to Ne = 75). Partition of genetic trends revealed that local genetics made a negligible contribution to genetic progress, which for most traits was highly dependent on imported genetics (>80%). Mean generation intervals were fairly constant until 2009 (8–9 years for males and 5–6 years for females, respectively) and then decreased, especially in the paths of sires of bulls and dams of bulls (to 5 and 4 years, respectively) mostly due to the influence of imported sires. The reduction in generation intervals was counterbalanced by a marked deterioration of realized selection differentials, particularly in the path of sires of bulls that nevertheless made the largest contribution to genetic progress. In the last 20 years, realized selection differentials in this path went from 533.6 to 170.8 kg for milk yield and from 16.7 to 13.3 kg for protein yield (1.7–0.5 and 1.6–1.3 standard deviation units, respectively). Among all considered traits (milk yield, fat yield, protein yield, stature, final score and daughter pregnancy rate) in the analysed period, annual genetic gain was negative for milk yield, fairly constant for composition and conformation traits, and positive only in the case of daughter pregnancy rate. Considered together, these results suggest that limited genetic progress is due to the absence of a sound breeding programme that includes genomic selection and a carefully defined selection objective, together with the absence of stronger regulations in germplasm importation; however, other factors such as potential genetics by environment interactions cannot be ruled out. EEA Balcarce Fil: Pardo, Alan Maxs. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Fil: Pardo, Alan Maxs. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Casanova, Daniel. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias; Argentina. Fil: Rubio, Natalia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias; Argentina. Fil: Andere, Cecilia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias; Argentina. Fil: Rodríguez, Edgardo. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Veterinarias; Argentina. Fil: Corva, Pablo M. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. 2023-03-28T18:25:48Z 2023-03-28T18:25:48Z 2023-02 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/14343 https://onlinelibrary.wiley.com/doi/10.1111/jbg.12766 1439-0388 (online) https://doi.org/10.1111/jbg.12766 eng info:eu-repograntAgreement/INTA/2019-PE-E6-I145-001/2019-PE-E6-I145-001/AR./Mejora genética objetiva para aumentar la eficiencia de los sistemas de producción animal. info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Wiley Journal of Animal Breeding and Genetics : 1-14 (First published: 27 February 2023) |
| spellingShingle | Ganado Bovino Razas (animales) Endogomia Pedigrí Respuesta a la Selección Cattle Breeds (animals) Inbreeding Pedigree Livestock Selecction Resposes Raza Holando Argentino Raza Holstein Pardo, Alan Maxs Casanova, Daniel Rubio, Natalia Andere, Cecilia Rodríguez, Edgardo Corva, Pablo An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title | An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title_full | An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title_fullStr | An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title_full_unstemmed | An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title_short | An insight into population structure and genetic progress of Argentinean Holstein cattle |
| title_sort | insight into population structure and genetic progress of argentinean holstein cattle |
| topic | Ganado Bovino Razas (animales) Endogomia Pedigrí Respuesta a la Selección Cattle Breeds (animals) Inbreeding Pedigree Livestock Selecction Resposes Raza Holando Argentino Raza Holstein |
| url | http://hdl.handle.net/20.500.12123/14343 https://onlinelibrary.wiley.com/doi/10.1111/jbg.12766 https://doi.org/10.1111/jbg.12766 |
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