Estimation of genetic parameters for daily gains of bulls with multi-trait and random regression models

KREJČOVÁ, H., MIELENZ, N., PŘIBYL, J. & SCHÜLER, L.. Estimation of genetic parameters for daily gains of bulls with multi-trait and random regression models. Archiv für Tierzucht. 2007, roč. 50, č. 1, s. 37-46.
KREJČOVÁ, Hana., MIELENZ, N., PŘIBYL, Josef and SCHÜLER, L. Estimation of genetic parameters for daily gains of bulls with multi-trait and random regression models. Archiv für Tierzucht, 2007, 50, 37-46. ISSN 0003-9438.
Year2007
CathegoryScientific publication in impacted journals
Internal link7033.pdf
Abstract

The average daily gains of Czech Pied bulls (dual-purpose, Simmental type) were analyzed using single-trait animal models, a multi-trait animal model and random regression models. The herd-year-season classes (HYS) were created and season was defined as3-month class starting with December. Legendre polynomials were used to describe daily gains within the HYS classes and to model bull-specific gain curves. The results showed that polynomials of at least the 2nd degree are to be used for the genetic analysis of daily gains.