Estimates of genetic and crossbreeding parameters for 305-day milk yield of Girolando cows
| Autor: | Luis Telo da Gama, G. S. Campos, Jaime Araujo Cobuci, Elisandra Lurdes Kern, Marcos Vinícius Gualberto Barbosa da Silva, Juliana Dementshuck Machado, Darlene dos Santos Daltro, João Cláudio do Carmo Panetto |
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| Přispěvatelé: | DARLENE DOS SANTOS DALTRO, Universidade Federal do Rio Grande do Sul, MARCOS VINICIUS GUALBERTO B SILVA, CNPGL, LUIS TELO DA GAMA, Universidade de Lisboa, JULIANA DEMENTSHUCK MACHADO, Universidade Federal do Rio Grande do Sul, ELISANDRA LURDES KERN, Universidade Estadual do Oeste do Paraná, GABRIEL SOARES CAMPOS, Universidade Federal do Rio Grande do Sul, JOAO CLAUDIO DO CARMO PANETTO, CNPGL, JAIME ARAUJO COBUCI, Universidade Federal do Rio Grande do Sul. |
| Rok vydání: | 2019 |
| Předmět: |
040301 veterinary sciences
Heterosis heritability Biology SF1-1100 Crossbreed Heritability 0403 veterinary science fluids and secretions Animal science Milk yield Vaca Leiteira Modelo Matemático heterosis dairy cows Bovino Mathematical models Dairy cows 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences 040201 dairy & animal science Breed Animal culture Heterose Gado Leiteiro Animal Science and Zoology mathematical model |
| Zdroj: | Italian Journal of Animal Science, Vol 19, Iss 1, Pp 86-94 (2020) Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1828-051X |
| Popis: | The objective of this work was to evaluate the effects of breed and heterosis on the estimates of genetic parameters of 305-day milk yield (305MY), by fitting milk yield data to the Wood, Mixed Log, Morgan, and Wilmink non-linear models. A total of 258,891 test-day milk yield records of 37,965 Holstein (H), Gyr (G), and Girolando (1/2 H, 1/4 H, 3/4 H, 3/8 H, 5/8 H and 7/8 H genetic groups) cows from 1840 herds were collected in the state of Minas Gerais, Brazil, in the period of 1998 to 2014. The pedigree file included 36,640 animals, 3677 bulls and 24,472 cows. The genetic parameters were obtained by one-character analysis using the AIREMLF90 software. The heritability estimates of 305MY, and of 305MY fitted to the different nonlinear models ranged from 0.14 to 0.20. Most genetic groups had heterosis effect, with the greatest effects for 305MY on 1/2 H (1/2 Holstein × 1/2 Gyr) cows, presenting a milk yield of 1112.73 kg higher than the average of their parents. The results indicate that most genetic groups of Girolando present heterosis effect for 305MY estimated through nonlinear models, and the possibility of obtaining moderate genetic gains when these animals are subjected to selection procedures.HIGHLIGHTS The use Girolando cows in production systems in Brazil has shown positive results of production. This greater productive efficiency may be because of heterosis on the production and adaptation of these animals. The effect of breed and heterosis can be included in traditional models for the improvement of selection. |
| Databáze: | OpenAIRE |
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