4 documents found, page 1 of 1
Genome-wide association study and annotating candidate gene networks affecting ...
Mota, R.R.; Guimarães, S.E.F.; Fortes, M.R.S.; Hayes, B.; Silva, F.F.; Verardo, L.L.; Kelly, M.J.; Campos, C.F. de; Guimarães, J.D.; Wenceslau, R.R.We performed a genome-wide mapping for the age at first calving (AFC) with the goal of annotating candidate genes that regulate fertility in Nellore cattle. Phenotypic data from 762 cows and 777k SNP genotypes from 2,992 bulls and cows were used. Single nucleotide polymorphism (SNP) effects based on the single-step GBLUP methodology were blocked into adjacent windows of 1 Megabase (Mb) to explain the genetic va...
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 ...
Influence of animals obtained using embryo transfer on the genetic evaluation o...
Mota, R.R.; Lopes, P.S.; Marques, L.F.A.; Pessoa, M. Conceição; Silva, L.P.; Torres, R. Almeida; Resende, M.D.V.Weight records of Simmental beef cattle were used in a genetic evaluation of growth with and without embryo transfer (ET). A random regression model in which ET individuals were excluded (RRM1) contained 29,510 records from 10,659 animals, while another model that did not exclude these animals (RRM2) contained 62,895 records from 23,160 animals. The fixed and random regressions were represented by continuous fu...
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...