Best linear unbiased prediction for across-flock/year breeding
values
D.J. Garrick
Department of Animal Science, Massey University, Palmerston
North, New Zealand
Proceedings of the New Zealand Society of Animal Production.
1991, 51: 411-416
In New Zealand, breeding values have been predicted using the
method of selection index (Sheeplan, Beefplan, Animalplan) or variants
such as a modified contemporary comparison (Dairy Cattle). Over the
last decade, research systems for evaluating beef cattle, dairy cattle,
sheep and pigs in New Zealand have increasingly made use of Henderson's
mixed model equations. In appropriate circumstances, these equations
give rise to evaluations which are best, linear and unbiased predictions
(BLUP). This review compares and contrasts theoretical and applied
aspects of evaluation using selection index and BLUP. An example is
used to demonstrate the rationale of BLUP for evaluating animals with
records in different contemporary groups such as across flocks or years.
Keywords: NZSAPAB;
BLUP; selection index; sire reference analysis
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Last Updated 25-01-1997
