Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds
Milk production has high economic importance in dairy cattle production systems, which justifies its inclusion in genetic breeding programs. The objective of this study was to evaluate the genetic and phenotypic trends of dairy traits in Gyr (167 lactations) and Guzerá (148 lactations) breeds in th...
| Authors: | ; ; ; ; ; |
|---|---|
| Format: | Article |
| Status: | Published version |
| Publication date: | 2017 |
| Country: | Brasil |
| Institution: | UEM |
| Repository: | Acta Scientiarum. Animal Sciences (Online) |
| Language: | English |
| OAI Identifier: | oai:periodicos.uem.br/ojs:article/36685 |
| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36685 |
| Access Level: | Open access |
| Keyword: | genetic progress milk production selection zebu. |
| _version_ | 1878763625067315200 |
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| author | Rangel, Adriano Henrique do Nascimento |
| author2 | Araújo, Thalita Polyana Monteiro Lima, Guilherme Ferreira da Costa Borba, Luiz Henrique Fernandes Peixoto, Maria Gabriela Campolina Diniz Lima Júnior, Dorgival Morais de |
| author2_role | author author author author author |
| author_browse | Araújo, Thalita Polyana Monteiro Borba, Luiz Henrique Fernandes Lima Júnior, Dorgival Morais de Lima, Guilherme Ferreira da Costa Peixoto, Maria Gabriela Campolina Diniz Rangel, Adriano Henrique do Nascimento |
| author_facet | Rangel, Adriano Henrique do Nascimento Araújo, Thalita Polyana Monteiro Lima, Guilherme Ferreira da Costa Borba, Luiz Henrique Fernandes Peixoto, Maria Gabriela Campolina Diniz Lima Júnior, Dorgival Morais de |
| author_role | author |
| collection | Acta Scientiarum. Animal Sciences (Online) |
| description | Milk production has high economic importance in dairy cattle production systems, which justifies its inclusion in genetic breeding programs. The objective of this study was to evaluate the genetic and phenotypic trends of dairy traits in Gyr (167 lactations) and Guzerá (148 lactations) breeds in the State of Rio Grande do Norte (RN). Milk, fat and protein production obtained from monthly dairy controls were the traits evaluated. The expected differences in progeny (DEPs) for these traits were estimated using an animal model. From the means of phenotypic values and DEPs, we estimated the genetic and phenotypic trends in linear regressions as a function of the year of calving of the animal. Positive genetic and phenotypic trends were observed for Gyr (26.8 and 88.7 kg year-1) and Guzerá (8.44 and 37.68 kg year-1). Gyr breed presented positive genetic trends for fat (1.08 kg year-1) and protein (0.45 kg year-1) production and the Guzerá breed showed positive genetic trends for fat (0.36 kg year-1) and protein (0.25 kg year-1) production. The selection applied in the evaluated herds has produced satisfactory genetic and phenotypic progress for milk, fat and protein production. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | BR_c18f5f7e4fb8d745c19aa4e5f8be7f7c |
| institution | UEM |
| instname_str | Universidade Estadual de Maringá (UEM) |
| language | eng |
| network_acronym_str | BR |
| network_name_str | Brasil |
| oai_identifier_str | oai:periodicos.uem.br/ojs:article/36685 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| publisher | Editora da Universidade Estadual de Maringá |
| publisherStr | Editora da Universidade Estadual de Maringá |
| reponame_str | Acta Scientiarum. Animal Sciences (Online) |
| spelling | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds Rangel, Adriano Henrique do Nascimento Araújo, Thalita Polyana Monteiro Lima, Guilherme Ferreira da Costa Borba, Luiz Henrique Fernandes Peixoto, Maria Gabriela Campolina Diniz Lima Júnior, Dorgival Morais de genetic progress milk production selection zebu. Milk production has high economic importance in dairy cattle production systems, which justifies its inclusion in genetic breeding programs. The objective of this study was to evaluate the genetic and phenotypic trends of dairy traits in Gyr (167 lactations) and Guzerá (148 lactations) breeds in the State of Rio Grande do Norte (RN). Milk, fat and protein production obtained from monthly dairy controls were the traits evaluated. The expected differences in progeny (DEPs) for these traits were estimated using an animal model. From the means of phenotypic values and DEPs, we estimated the genetic and phenotypic trends in linear regressions as a function of the year of calving of the animal. Positive genetic and phenotypic trends were observed for Gyr (26.8 and 88.7 kg year-1) and Guzerá (8.44 and 37.68 kg year-1). Gyr breed presented positive genetic trends for fat (1.08 kg year-1) and protein (0.45 kg year-1) production and the Guzerá breed showed positive genetic trends for fat (0.36 kg year-1) and protein (0.25 kg year-1) production. The selection applied in the evaluated herds has produced satisfactory genetic and phenotypic progress for milk, fat and protein production. Editora da Universidade Estadual de Maringá https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36685 10.4025/actascianimsci.v40i0.36685 |
| spellingShingle | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds Rangel, Adriano Henrique do Nascimento genetic progress milk production selection zebu. |
| status_str | publishedVersion |
| title | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| title_full | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| title_fullStr | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| title_full_unstemmed | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| title_short | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| title_sort | Estimation of genetic and phenotypic trends for dairy traits of Gyr and Guzerá breeds |
| topic | genetic progress milk production selection zebu. |
| topic_facet | genetic progress milk production selection zebu. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36685 |