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Genetic and phenotypic variation of some reproductive traits in Egyptian buffalo

Aziz M.A. Schoeman S.J. Jordaan G.F. El-Chafie O.M. Mahdy A.T. (2001)

The objectives of this study were to determine the effects of season, year of calving and parity on lactation period, calving interval, number of days open and dry period in Egyptian buffalo, and to estimate genetic and ...
The influence of multicollinearity on crossbreeding parameter estimates for weaning weight in beef cattle

Schoeman S.J. Aziz M.A. Jordaan G.F. (2002)

Data on 17258 weaning weight records of calves from a crossbreeding project were utilized to investigate the problem of collinearity and its effect on the estimation of direct, maternal and the non-additive genetic effects. ...
The influence of outliers on a model for the estimation of crossbreeding parameters for weaning weight in a beef cattle herd

Aziz M.A. Schoeman S.J. Jordaan G.F. (2002)

Data on 17348 weaning weight records from a beef cattle crossbreeding operation were used to determine the effect of outliers on regression coefficients. Different criteria were used for detecting potential influential ...

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