Inclusion of genomic information in the development of economic index for dairy cattle selection

• Grant number: 12/15948-7
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): April 01, 2013
• Effective date (End): March 31, 2016
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Genetics and Improvement of Domestic Animals
• Principal Investigator: Gerson Barreto Mourão
• Grantee: Juliana Petrini
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

Selection indexes are restricted to traits easily measured and related to high heritabilities. This way, the use of molecular information on these may result in gains in accuracy and selection response, mainly due to the inclusion of a larger number of traits and molecular markers information. Thus, the aim of this research is to incorporate genomic information in the development of economic indexes. Phenotypic and genotypic data of productive and functional traits from 2000 Hostein dams will be used. The economic values will be constructed bases on five breeding objectives (production, quality, reproduction, health, maintenance) and three payment scenarios (milk yield, dairy products, nutritional quality). Economic weights will be estimated by the partial derivative of the profit function for each trait evaluated at the average of the others. Breeding values prediction will be based in two approaches: traditional and genomic, in which the relationship matrix is replaced by a modified matrix that combines genomic and pedigree information. The prediction model will include the fixed effects of contemporary groups, days in milk and lactation class, the additive genetic random effects and the residual effect. The methods will be compared for the genomic values prediction, animals ranking, accuracy and mean squared error. Equally, the economic indexes for sire selection will be evaluated by rank correlation, reliability and selection response. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

IUNG, L. H. S.; PETRINI, J.; RAMIREZ-DIAZ, J.; SALVIAN, M.; ROVADOSCKI, G. A.; PILONETTO, F.; DAURIA, B. D.; MACHADO, P. F.; COUTINHO, L. L.; WIGGANS, G. R.; et al. Genome-wide association study for milk production traits in a Brazilian Holstein population. JOURNAL OF DAIRY SCIENCE, v. 102, n. 6, p. 5305-5314, JUN 2019. (12/24788-3, 10/12929-6, 12/15948-7)

CARRARA, EULA REGINA; GAYA, LEILA DE GENOVA; PETRINI, JULIANA; DE PAIVA, JOSE TEODORO; SALVIAN, MAYARA; ROVADOSCKI, GREGORI ALBERTO; MACHADO, PAULO FERNANDO; MOURAO, GERSON BARRETO. Genetic and phenotypic trends for milk fatty acids in a Holstein cattle population reared under tropical conditions. LIVESTOCK SCIENCE, v. 228, p. 84-92, OCT 2019. (12/15948-7, 16/15066-5, 10/12929-6, 12/24788-3)

CARRARA, EULA REGINA; GAYA, LEILA DE GENOVA; DE PAIVA, JOSE TEODORO; PETRINI, JULIANA; SALVIAN, MAYARA; ROVADOSCKI, GREGORI ALBERTO; REIS, ARICIA CHAVES ZANETTI; MACHADO, PAULO FERNANDO; MOURAO, GERSON BARRETO. Impact of inbreeding on milk fatty acids of a Brazilian Holstein cattle. ANIMAL PRODUCTION SCIENCE, v. 60, n. 12, APR 2020. (16/15066-5, 12/15948-7, 12/24788-3, 10/12929-6)

CARRARA, EULA REGINA; PETRINI, JULIANA; SALVIAN, MAYARA; DE OLIVEIRA, HINAYAH ROJAS; ROVADOSCKI, GREGORI ALBERTO; IUNG, LAIZA HELENA DE SOUZA; MIQUILINI, MARINA; MACHADO, PAULO FERNANDO; MOURAO, GERSON BARRETO. Genetic parameters for milk yield and quality traits of Brazilian Holstein cows as a function of temperature and humidity index. JOURNAL OF ANIMAL BREEDING AND GENETICS, v. 138, n. 6, JUN 2021. (12/15948-7, 12/24788-3, 10/12929-6, 16/15066-5)

PETRINI, JULIANA; DE SOUZA IUNG, LAIZA HELENA; PETERSEN RODRIGUEZ, MARY ANA; SALVIAN, MAYARA; ROVADOSCKI, GREGORI ALBERTO; ROBLES COLONIA, SADITT ROCIO; CASSOLI, LAERTE DAGHER; COUTINHO, LUIZ LEHMANN; MACHADO, PAULO FERNANDO; WIGGANS, GEORGE; et al. Assessing the accuracy of prediction for milk fatty acids by using a small reference population of tropical Holstein cows. JOURNAL OF ANIMAL BREEDING AND GENETICS, v. 136, n. 6, p. 453-463, NOV 2019. (12/15948-7, 10/12929-6, 12/24788-3)

PETRINI, JULIANA; DE SOUZA IUNG, LAIZA HELENA; PETERSEN RODRIGUEZ, MARY ANA; SALVIAN, MAYARA; ROVADOSCKI, GREGORI ALBERTO; ROBLES COLONIA, SADITT ROCIO; CASSOLI, LAERTE DAGHER; COUTINHO, LUIZ LEHMANN; MACHADO, PAULO FERNANDO; WIGGANS, GEORGE; et al. Assessing the accuracy of prediction for milk fatty acids by using a small reference population of tropical Holstein cows. JOURNAL OF ANIMAL BREEDING AND GENETICS, AUG 2019. (12/15948-7, 10/12929-6, 12/24788-3)

PETRINI, J.; IUNG, L. H. S.; RODRIGUEZ, M. A. P.; SALVIAN, M.; PERTILLE, F.; ROVADOSCKI, G. A.; CASSOLI, L. D.; COUTINHO, L. L.; MACHADO, P. F.; WIGGANS, G. R.; et al. Genetic parameters for milk fatty acids, milk yield and quality traits of a Holstein cattle population reared under tropical conditions. JOURNAL OF ANIMAL BREEDING AND GENETICS, v. 133, n. 5, p. 384-395, OCT 2016. (10/12929-6, 12/15948-7)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PETRINI, Juliana. Incorporation of genomic information in the development of economic indices for dairy cattle selection. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.