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Estimates of genetic parameters for total milk yield over multiple ages in Brazilian Murrah buffaloes using different models

R. C. Sesana, Baldi, F., Borquis, R. R. A., Bignardi, A. B., Hurtado-Lugo, N. A., L. Faro, E., Albuquerque, L. G., and Tonhati, H., Estimates of genetic parameters for total milk yield over multiple ages in Brazilian Murrah buffaloes using different models, vol. 13, pp. 2784-2795, 2014.

The objective of this study was to estimate variance components and genetic parameters for accumulated 305-day milk yield (MY305) over multiple ages, from 24 to 120 months of age, applying random regression (RRM), repeatability (REP) and multi-trait (MT) models. A total of 4472 lactation records from 1882 buffaloes of the Murrah breed were utilized. The contemporary group (herd-year-calving season) and number of milkings (two levels) were considered as fixed effects in all models.

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