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Selection criteria for economic importance traits in Santa Inês sheep

Abstract

The aim of this study is determine measurements that are indicative of resistance to parasites in Santa Inês sheep and estimate genetic parameters for eye scores (ES), fecal egg counts (FEC) and packed cell volume (PCV) and estimate genetic parameters for productive and reproductive traits and the association between these traits with ES, FEC and PCV. The project will be developed in the southeastern region of Brazil. The data of traits indicative for resistance to nematode parasites will be held by a trained person in different ages, each 30 days interval. Previous data sets recorded by breeders will be collected for the following traits: age at first calving, calving interval, and weights in different ages, scrotal circumference and prolificacy. The variance components for productive and reproductive traits, and resistance to nematode parasites will be estimated by restricted maximum likelihood (REML) using MTDFREML (Boldman et al., 1993), WOMBAT (Meyer, 2006) e Bayesian inference using THRGIBBS2F90 (Misztal et al., 2002) package. (AU)

Scientific publications
(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)
FREITAS, L. A.; SAVEGNAGO, R. P.; OLIVEIRA, E. J.; PAZ, C. C. P.; MUNARI, D. P. Inheritance, genetic correlation and cluster analyses of fecal egg count, packed cell volume and body weight in different ages using random regression model in Santa Ines sheep. Small Ruminant Research, v. 174, p. 57-61, MAY 2019. Web of Science Citations: 0.
OLIVEIRA, ELISA JUNQUEIRA; SAVEGNAGO, RODRIGO PELICIONI; DE FREITAS, LUARA AFONSO; FREITASO, ANIELLY PAULA; MAIA, SUELLEN RODRIGUES; SIMILI, FLAVIA FERNANDA; EL FARO, LENIRA; DIAS DA COSTA, RICARDO LOPES; SANTANA JUNIOR, MARIO LUIZ; PARO DE RAZ, CLAUDIA CRISTINA. Estimates of genetic parameters and cluster analysis for worm resistance and resilience in Santa Ines meat sheep. Pesquisa Agropecuária Brasileira, v. 53, n. 12, p. 1338-1345, DEC 2018. Web of Science Citations: 0.

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