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Short Communication: Effect of Phantom Parent Grouping and Properties of Deregression for a Low Heritability Trait

Interbull Centre, Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences 750 07 Uppsala, Sweden

Corresponding author:
T. Mark; e-mail:
Thomas.Mark{at}hgen.slu.se.

Properties of deregression for a low heritability trait (clinical mastitis in Sweden with heritability of 0.02) and effects of using different definitions of genetic groups in within-country deregression compared with the across-country analysis were studied. The deregression procedure was satisfactory, and the effects of different phantom parent grouping in within-country deregression compared with across-country analysis were negligible here.

Abbreviation key: CM = clinical mastitis, MACE = multiple-trait across-country evaluations.

Key Words: deregression • genetic group • multiple-trait across-country evaluation • low heritability

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				T. Mark and P. G. Sullivan Multiple-Trait Multiple-Country Genetic Evaluations for Udder Health Traits J Dairy Sci, December 1, 2006; 89(12): 4874 - 4885. [Abstract] [Full Text] [PDF]