ESTIMATE  OF BEST LINER UNBIASED PREDICTION  OF  FRIESIAN  BULLS  ACCORDING  TO  SOME  GROWTH  TRAITS  OF  PROGENY

	ESTIMATE OF BEST LINER UNBIASED PREDICTION OF FRIESIAN BULLS ACCORDING TO SOME GROWTH TRAITS OF PROGENY
AL-TAQANI
Article 1, Volume 21, Issue 2, 2008, Pages 0-0
Abstract
This study includeds 850 records( From second generation records) of growth traits for the 10 Friesian Bulls , over the period from 2001 to 2003 , at AL – Tadhamin Dairy Cattle Station , Al-kut city ( 220 km south of Baghdad ) .The study was conducted to genetic evaluation of bulls of growth traits after adjusting the effect of fixed factor and estimate the genetic parameters. General linear Model ( GLM ) within SAS program was used to study the effect of fixed factors ( Parity , Season and year of calving , and age at first calving ) on birth weight (BWT ) , Weaning weight (WWT ) and gain body weight (GBW ) from birth to weaning . Restricted Maximum likelihood (REML ) was conducted to estimate variance of components of random effects supposing Mixed Model . The Harvey program was also used to estimate of the BLUP values of bulls . Heritability of BWT , WWT an GBW were o.21 , 0.27 and 0.27 respectively - Highest genetic and phenotypic correlation were exited between WWT and GBW ( 0.91 ) and ( o.96 ) respectively ( P< 0.01 ) . The wide range in estimate of BLUP ( Best Linear Unbiased Prediction ) values of bulls within this Study depending on BWT , WWT and GBW , the indicator of genetic additive variance in this traits , important in Selection programs

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