The European Association for Animal Production (EAAP) , 2010-08-23
Title : ( comparison of fixed and random regression test-day models for genetic evaluation of milk yeild trait of iranian holstein cows )
Authors: YASAMAN SHAMSHIRGARAN , Ali Asghar Aslaminejad , Mojtaba Tahmoorespur , H Farhangfar , fateme bahri binabaj , AMIR TAHERI GHAHFAROKHI ,File: 
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Full TextAbstract
In this research, fixed regression test -day model andrandom regression test day model were studied for genetic evaluation of milk yeild of iranian holsteins dairy cattle.the lowest and higher for the second half of the location than that of the first half of the lactation period.the lowest and the highest heritabilities were found for the first(0.102) and the sixth(0.235) mounth of lactation.
