Association between reproductive traits and milk yield, in crossbred heifers
This research was carried out in heifers from a crisscrossing program between the red Holstein and Brahman breeds, in Venezuela. (Co)variance components were estimated and the relationship between milk yield (P305), age (AGE1) and fertility at first service (FERT1) in virgin heifers was investigated...
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2023
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| author | Roman Bravo, Rafael Maria |
| author2 | Aranguren Méndez, José Atilio Garcidueñas Piña, Rogelio Gómez Ramos, Benjamín García Gavidia, Alfredo Nicanor Márquez Carrera, Edelmira Criseida Soto Belloso, Eleazar |
| author2_role | author author author author author author |
| author_facet | Roman Bravo, Rafael Maria Aranguren Méndez, José Atilio Garcidueñas Piña, Rogelio Gómez Ramos, Benjamín García Gavidia, Alfredo Nicanor Márquez Carrera, Edelmira Criseida Soto Belloso, Eleazar |
| author_role | author |
| collection | Revistas Escuela Superior Politécnica Agropecuaria de Manabí |
| dc.creator.none.fl_str_mv | Roman Bravo, Rafael Maria Aranguren Méndez, José Atilio Garcidueñas Piña, Rogelio Gómez Ramos, Benjamín García Gavidia, Alfredo Nicanor Márquez Carrera, Edelmira Criseida Soto Belloso, Eleazar |
| dc.date.none.fl_str_mv | 2023-07-13 |
| dc.format.none.fl_str_mv | application/pdf text/html application/zip |
| dc.identifier.none.fl_str_mv | https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358 10.51260/revista_espamciencia.v14i2.358 |
| dc.language.none.fl_str_mv | spa |
| dc.publisher.none.fl_str_mv | Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López |
| dc.relation.none.fl_str_mv | https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/366 https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/445 https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/496 |
| dc.rights.none.fl_str_mv | http://creativecommons.org/licenses/by-nc-sa/4.0 info:eu-repo/semantics/openAccess |
| dc.source.none.fl_str_mv | Revista ESPAMCIENCIA; Vol. 14 Núm. 2 (2023): REVISTA ESPAMCIENCIA 2023; 63-70 1390-8103 reponame:Revistas Escuela Superior Politécnica Agropecuaria de Manabí instname:Escuela Superior Politécnica Agropecuaria de Manabí instacron:ESPAM |
| dc.title.none.fl_str_mv | Association between reproductive traits and milk yield, in crossbred heifers Asociación entre características reproductivas y producción de leche, en novillas mestizas |
| dc.type.none.fl_str_mv | info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares |
| description | This research was carried out in heifers from a crisscrossing program between the red Holstein and Brahman breeds, in Venezuela. (Co)variance components were estimated and the relationship between milk yield (P305), age (AGE1) and fertility at first service (FERT1) in virgin heifers was investigated. The analysis methodology was restricted maximum likelihood (REML), under a multivariate animal model. The mixed model included: the random effect of the animal; and the fixed effects of racial group, year-seasons of the event occurrence; for P305, the duration of lactation was also included as a covariate in quadratic form. Heritabilities were: 0.498 ± 0.022; 0.436 ± 0.020 and 0.024 ± 0.008, for P305, AGE1 and FERT1 respectively. Genetic correlations between: P305-AGE1; P305-FERT1 and AGE1-FERT1, were: -0.281±0.040; 0.238 ± 0.117 and -0.076 ± 0.123, these results suggest a favorable genetic association between P305-AGE1, as well as, between P305-FERT1. Weighted regression analysis of the averages breeding values on years, showed an improvement in P305 of 10.85 kg/year and a reduction of -0.1150 month/year in AGE1 representing 0.60 and 0.41% of the population means for those traits (p < 0.01); the annual genetic change for FERT1 was not significant (p > 0.05). The phenotypic changes in P305 and AGE1 were not significant (p > 0.05). It is concluded that there is no genetic antagonism between P305 and FERT1 and that it is possible to reduce AGE1 for decreasing the costs for generating replacement heifers, improving the rate of genetic change in P305. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | RevESPAM_79dabdcba1505d95458ad79cd0cf208d |
| identifier_str_mv | 10.51260/revista_espamciencia.v14i2.358 |
| instacron_str | ESPAM |
| institution | ESPAM |
| instname_str | Escuela Superior Politécnica Agropecuaria de Manabí |
| language | spa |
| network_acronym_str | RevESPAM |
| network_name_str | Revistas Escuela Superior Politécnica Agropecuaria de Manabí |
| oai_identifier_str | oai:espamciencia.espam.edu.ec:article/358 |
| publishDate | 2023 |
| publisher.none.fl_str_mv | Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López |
| reponame_str | Revistas Escuela Superior Politécnica Agropecuaria de Manabí |
| repository.mail.fl_str_mv | . |
| repository.name.fl_str_mv | Revistas Escuela Superior Politécnica Agropecuaria de Manabí - Escuela Superior Politécnica Agropecuaria de Manabí |
| repository_id_str | 0 |
| rights_invalid_str_mv | http://creativecommons.org/licenses/by-nc-sa/4.0 |
| spelling | Association between reproductive traits and milk yield, in crossbred heifersAsociación entre características reproductivas y producción de leche, en novillas mestizasRoman Bravo, Rafael MariaAranguren Méndez, José AtilioGarcidueñas Piña, RogelioGómez Ramos, BenjamínGarcía Gavidia, Alfredo NicanorMárquez Carrera, Edelmira CriseidaSoto Belloso, EleazarThis research was carried out in heifers from a crisscrossing program between the red Holstein and Brahman breeds, in Venezuela. (Co)variance components were estimated and the relationship between milk yield (P305), age (AGE1) and fertility at first service (FERT1) in virgin heifers was investigated. The analysis methodology was restricted maximum likelihood (REML), under a multivariate animal model. The mixed model included: the random effect of the animal; and the fixed effects of racial group, year-seasons of the event occurrence; for P305, the duration of lactation was also included as a covariate in quadratic form. Heritabilities were: 0.498 ± 0.022; 0.436 ± 0.020 and 0.024 ± 0.008, for P305, AGE1 and FERT1 respectively. Genetic correlations between: P305-AGE1; P305-FERT1 and AGE1-FERT1, were: -0.281±0.040; 0.238 ± 0.117 and -0.076 ± 0.123, these results suggest a favorable genetic association between P305-AGE1, as well as, between P305-FERT1. Weighted regression analysis of the averages breeding values on years, showed an improvement in P305 of 10.85 kg/year and a reduction of -0.1150 month/year in AGE1 representing 0.60 and 0.41% of the population means for those traits (p < 0.01); the annual genetic change for FERT1 was not significant (p > 0.05). The phenotypic changes in P305 and AGE1 were not significant (p > 0.05). It is concluded that there is no genetic antagonism between P305 and FERT1 and that it is possible to reduce AGE1 for decreasing the costs for generating replacement heifers, improving the rate of genetic change in P305. Esta investigación se realizó con novillas de un programa de cruzamiento entre las razas Holstein y Brahman roja, en Venezuela. Se estimaron los componentes de (co)varianza y se investigó la relación entre producción de leche (P305), edad (AGE1) y fertilidad al primer servicio (FERT1) en novillas vírgenes. La metodología de análisis fue bajo máxima verosimilitud restringida (REML), bajo un modelo animal multivariado. El modelo lineal incluía: el efecto aleatorio del animal; y los efectos fijos de grupo racial, años-temporadas de ocurrencia del evento; para P305, la duración de la lactancia también se incluyó como covariable en forma cuadrática. Las heredabilidades fueron: 0,498 ± 0,022; 0,436 ± 0,020 y 0,024 ± 0,008, para P305, AGE1 y FERT1 respectivamente. Las correlaciones genéticas entre: P305-AGE1; P305-FERT1 y AGE1-FERT1, fueron: -0,281±0,040; 0,238 ± 0,117 y -0,076 ± 0,123, estos resultados sugieren una asociación genética favorable entre P305-AGE1, así como entre P305-FERT1. El análisis de regresión ponderada de los valores genéticos promedios en años, mostró una mejora en P305 de 10.85 kg/año y una reducción de -0.1150 mes/año en AGE1 lo cual representa 0.60 y 0.41% de las medias poblacionales para esos rasgos (p < 0.05), el cambio genético anual para FERT1 no fue significativo (p > 0,05). Los cambios fenotípicos en P305 y AGE1 no fueron significativos (p > 0,01). Se concluye que no existe antagonismo genético entre P305 y FERT1 y que es posible reducir AGE1 para disminuir los costos de generación de vaquillas, mejorando la tasa de cambio genético en P305.Escuela Superior Politécnica Agropecuaria de Manabí Manuel Félix López2023-07-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArtículo revisado por paresapplication/pdftext/htmlapplication/ziphttps://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/35810.51260/revista_espamciencia.v14i2.358Revista ESPAMCIENCIA; Vol. 14 Núm. 2 (2023): REVISTA ESPAMCIENCIA 2023; 63-701390-8103reponame:Revistas Escuela Superior Politécnica Agropecuaria de Manabíinstname:Escuela Superior Politécnica Agropecuaria de Manabíinstacron:ESPAMspahttps://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/366https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/445https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358/496http://creativecommons.org/licenses/by-nc-sa/4.0info:eu-repo/semantics/openAccess2024-07-29T15:40:10Zoai:espamciencia.espam.edu.ec:article/358Institucionalhttp://revistasespam.espam.edu.ec/Universidad públicahttp://www.espam.edu.ec/http://revistasespam.espam.edu.ec/oai.Ecuador.1390-81031390-597Xopendoar:02024-07-29T15:40:10Revistas Escuela Superior Politécnica Agropecuaria de Manabí - Escuela Superior Politécnica Agropecuaria de Manabífalse |
| spellingShingle | Association between reproductive traits and milk yield, in crossbred heifers Roman Bravo, Rafael Maria |
| status_str | publishedVersion |
| title | Association between reproductive traits and milk yield, in crossbred heifers |
| title_full | Association between reproductive traits and milk yield, in crossbred heifers |
| title_fullStr | Association between reproductive traits and milk yield, in crossbred heifers |
| title_full_unstemmed | Association between reproductive traits and milk yield, in crossbred heifers |
| title_short | Association between reproductive traits and milk yield, in crossbred heifers |
| title_sort | Association between reproductive traits and milk yield, in crossbred heifers |
| url | https://revistasespam.espam.edu.ec/index.php/Revista_ESPAMCIENCIA/article/view/358 |