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For YWG, YC, YP, YM and SC, contemporary groups were formed by farm, year and season of birth, sex (except for SC), management group at weaning and yearling and yearling date (only for visual scores).
In modeling these traits, covariates considered for each trait were: visual scores and SC [animal age at recording and dam age at calving (linear and quadratic effects)]; BWG [days number of birth at weaning (linear effect) and dam age at calving (linear and quadratic effects)]; YWG [days number of weaning at yearling (linear effect) and dam age at calving (linear and quadratic effects)].
A linear animal model was used for BWG, YWG and SC and a threshold model for visual scores.
Thus, the distribution of y for traits with continuous distribution (BWG, YWG and SC), given the location and scale parameters, can be described as follows:
Despite the low heritability estimated for YWG (0.19 [+ or -] 0.04), it is expected that the use of sires with higher breeding values for this trait could improve the growth of progenies, reducing the time to obtain the minimum weight for slaughter.
For all yearling traits, the genetic gains were positive and significant (p < 0.05) (Figure 6), which represented increases of 0.15, 0.10, 0.36, 0.36 and 0.08% [year.sup.-1] of the phenotypic mean of YWG, YC, YP, YM and SC, respectively.
Posterior density of direct heritability for weaning to yearling weight gain (YWG), yearling visual scores of conformation (YC), precocity (YP) and muscling (YM) and scrotal circumference (SC) in Nellore cattle.
Direct genetic trends for weaning to yearling weight gain (YWG), yearling visual scores of conformation (YC), precocity (YP) and muscling (YM) and scrotal circumference (SC) in Nellore cattle.
The immense, glass-dominated terminal building meets all LEED (Leadership in Energy and Environmental Design) levels of certification, making YWG the first Canadian airport to receive this accreditation.
In a departure from the landside-centred concessions layout, YWG has placed most of these businesses airside.
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