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Estimates of population and genetic parameters and genetic trends for economically important traits in Tabapuã cattle

Grant number: 13/09364-5
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): August 01, 2013
Effective date (End): July 31, 2014
Field of knowledge:Agronomical Sciences - Animal Husbandry - Genetics and Improvement of Domestic Animals
Principal Investigator:Danísio Prado Munari
Grantee:Priscila Arrigucci Bernardes
Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil

Abstract

Tabapuã is a zebu beef cattle breed originated in Brazil, highly adapted to Brazilian environmental conditions. The objectives of this study are to calculate effective population size, effective number of founders, effective number of ancestors, identify inbreeding and their effects in the population and estimate genetic parameters and genetic trends for weaning weight adjusted to 210 days of age, age at first calving, calving interval and accumulated productivity in Tabapuã beef cattle animals, aiming to support the Tabapuã breeding program. The data that will be used in this study are from animals allocated in pasture with weaning being performed at 6 to 8 months of age. The reproductive management consists in a breeding season ranging between 60 to 120 days with controlled mating or artificial insemination. Genetic parameters and breeding values will be estimated by restricted maximum likelihood, by multi-trait analysis whose general model will include additive genetic random effect, residual effect and fixed effect of contemporary groups (CG). For the trait weaning weight, we will also include in the model the maternal additive random genetic effect and the fixed effects (linear and quadratic) of the cows' age at calving. Genetic trends will be obtained from a linear regression of mean predicted breeding values (PBV) based on birth year.At-statistic will be used to test the hypothesis that the regression coefficient for each equation is equal to zero. The effect of inbreeding on traits will be estimated by linear regression of animals' phenotypic mean as a function of the inbreeding coefficient class.

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Scientific publications (5)
(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)
ROMANZINI, ELIEDER PRATES; DA SILVA SOBRINHO, AMERICO GARCIA; VALENCA, ROBERTA DE LIMA; BORGHI, THIAGO HENRIQUE; MERLIM, FERNANDA DE ALMEIDA; DE ANDRADE, NOMAIACI; BRANCACCI LOPES ZEOLA, NIVEA MARIA; CASTAGNINO, PABLO DE SOUZA; BERNARDES, PRISCILA ARRIGUCCI. Biodiesel Co-products Modified the Rumen Parameters of Feedlot Lambs but did Not Change Methane Production In Vitro. Acta Scientiae Veterinariae, v. 48, . (15/03918-4, 12/25250-7, 13/09364-5, 13/23495-5)
CAETANO, SABRINA L.; ROSA, GUILHERME J. M.; SAVEGNAGO, RODRIGO P.. Estimation of genetic parameters for longevity considering the cow's age at last calving. JOURNAL OF APPLIED GENETICS, v. 58, n. 1, p. 103-109, . (13/09364-5, 13/20091-0, 10/05903-0)
BERNARDES, P. A.; GROSSI, D. A.; SAVEGNAGO, R. P.; BUZANSKAS, M. E.; RAMOS, S. B.; ROMANZINI, E. P.; GUIDOLIN, D. G. F.; BEZERRA, L. A. F.; LOBO, R. B.; MUNARI, D. P.. Population structure of Tabapua beef cattle using pedigree analysis. LIVESTOCK SCIENCE, v. 187, p. 96-101, . (13/09364-5, 13/20091-0, 13/19335-2)
BERNARDES, P. A.; GROSSI, D. A.; SAVEGNAGO, R. P.; BUZANSKAS, M. E.; URBINATI, I.; BEZERRA, L. A. F.; LOBO, R. B.; MUNARI, D. P.. Estimates of genetic parameters and genetic trends for reproductive traits and weaning weight in Tabapua cattle. JOURNAL OF ANIMAL SCIENCE, v. 93, n. 11, p. 5175-5185, . (13/09050-0, 13/09364-5, 13/20091-0, 13/19335-2)
ROMANZINI, ELIEDER PRATES; DA SILVA SOBRINHO, AMERICO GARCIA; VALENCA, ROBERTA DE LIMA; BORGHI, THIAGO HENRIQUE; DE ANDRADE, NOMAIACI; BERNARDES, PRISCILA ARRIGUCCI. Feedlot of lambs fed biodiesel co-products: performance, commercial cuts and economic evaluation. TROPICAL ANIMAL HEALTH AND PRODUCTION, v. 50, n. 1, p. 155-160, . (13/23495-5, 13/09364-5, 12/25250-7)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
BERNARDES, Priscila Arrigucci. Análise de pedigree e estimativas de parâmetros genéticos para características de importância econômica em bovinos Tabapuã. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.

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