Direct-maternal covariance

Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle

L. Grigoletto, Mattos, E. C., Santana, M. H. A., Baldi, F., Eler, J. P., Ferraz, J. B. S., Grigoletto, L., Mattos, E. C., Santana, M. H. A., Baldi, F., Eler, J. P., and Ferraz, J. B. S., Inclusion of cytoplasmic lineage effect and direct-maternal genetic covariance for genetic evaluation of growth traits in Nellore cattle, vol. 15, p. -, 2016.

We evaluated the impact of cytoplasmic lineage effects (Lc) for growth traits on genetic evaluation, including the genetic covariance between direct and maternal effects (σam). Pedigree data from 496,190 Nellore animals and observations on birth weight (BW, N = 243,391), weaning weight (WW, N = 431,681), and post-weaning weight gain adjusted to 345 days (PWG, N = 172,131) were analyzed. Four univariate models were used to obtain estimates of (co)variance components using the restricted maximum likelihood method in the BLUPF90 program.

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