2 documents found, page 1 of 1
Genetic evaluation using multi-trait and random regression models in Simmental ...
Mota, R.R.; Marques, L.F.A.; Lopes, P.S.; Silva, L.P. da; A. Neto, F.R.; Resende, M.D.V. de; Torres, R.A.The Brazilian Association of Simmental and Simbrasil Cattle Farmers provided 29,510 records from 10,659 Simmental beef cattle; these were used to estimate (co)variance components and genetic parameters for weights in the growth trajectory, based on multi-trait (MTM) and random regression models (RRM). The (co)variance components and genetic parameters were estimated by restricted maximum likelihood. In the MTM ...
Random regression models in the evaluation of the growth curve of Simbrasil bee...
Mota, R.R.; Marques, L.F.A.; Lopes, P.S.; Silva, L.P. da; Hidalgo, A.M.; Leite, C.D.S.; Torres, R.A.Random regression models were used to estimate the types and orders of random effects of (co)variance functions in the description of the growth trajectory of the Simbrasil cattle breed. Records for 7049 animals totaling 18,677 individual weighings were submitted to 15 models from the third to the fifth order including as fixed effects sex, contemporary group, feeding regimen, and type of reproduction and as ra...