Productive efficiency

Repeatability and genotypic correlations of reproductive and productive traits of crossbred beef cattle dams

L. N. Silva, Gasparino, E., Júnior, R. A. A. Torres, K. Filho, E., Silva, L. O. C., Alencar, M. M., Júnior, M. D. Souza, Battistelli, J. V. F., and Silva, S. C. C., Repeatability and genotypic correlations of reproductive and productive traits of crossbred beef cattle dams, vol. 14, pp. 5310-5319, 2015.

Beef cattle production requires reproductive efficiency. However, measures of reproductive traits are not usually collected; consequently, correlated traits that could be used as indicators would be useful. We examined associations between measures of reproductive and productive efficiency that could be used as selection indicators. Data from 194 dams of the genetic groups Angus x Nelore, Caracu x Nelore, and Valdostana x Nelore collected over 4 years were used.

Genetic analysis of average annual productivity of Nellore breeding cows (COWPROD)

J. P. Eler, Ferraz, J. B. S., Balieiro, J. C. C., and Mattos, E. C., Genetic analysis of average annual productivity of Nellore breeding cows (COWPROD), vol. 7, pp. 234-242, 2008.

With the aim of estimating the coefficient of heritability of average annual productivity of Nellore cows (COWPROD), a data set from 24,855 animals with known pedigree was analyzed. COWPROD is defined as the amount (in kilograms) of weaned calves produced yearly by one cow during her remaining time in herd ignoring a fixed period of 365 days.

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