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Journal of Dairy Science Vol. 66 No. 9 1967-1975
© 1983 by American Dairy Science Association ®
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Recursive Procedures in Sire Evaluation1

Mario L. Martinez2 and M. F. Rothschild

Department of Animal Science, Iowa State University, Ames 50011

ABSTRACT

Recursive estimation procedures were extended and applied to a mixed model where random effects at stage k were related with random effects of stage k—1. Sire's transmitting ability estimated by the recursive procedure from data collected in two stages and considering the relationship among sires is equal to that obtained when all records were available at the same time. Use of recursive methods and their applicability to sire evaluation are considered.

FOOTNOTES

1 Journal Paper No. J-10755 of the Iowa Agriculture and Home Economics Experiment Station, Ames Project No. 1053.

2 Brazilian Agricultural Research Corporation (EMBRAPA). CNP-Gado de Leite. 36155 — Coronel Pacheco, MG, Brazil.






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