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Titolo:
OPTIMIZATION OF PROGENY TESTS WITH PRIOR INFORMATION ON YOUNG BULLS
Autore:
MEUWISSEN THE; GODDARD ME;
Indirizzi:
DLO,INST ANIM SCI & HLTH,BOX 65 NL-8200 AB LELYSTAD NETHERLANDS UNE,ANIM GENET & BREEDING UNIT ARMIDALE NSW AUSTRALIA
Titolo Testata:
Livestock production science
fascicolo: 1, volume: 52, anno: 1997,
pagine: 57 - 68
SICI:
0301-6226(1997)52:1<57:OOPTWP>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENETIC RESPONSE; DAIRY-CATTLE; SELECTION;
Keywords:
PROGENY TESTING; PRIOR INFORMATION; GENETIC EVALUATION; SELECTION RESPONSE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
T.H.E. Meuwissen e M.E. Goddard, "OPTIMIZATION OF PROGENY TESTS WITH PRIOR INFORMATION ON YOUNG BULLS", Livestock production science, 52(1), 1997, pp. 57-68

Abstract

Algorithms are derived to optimize the number of progeny records per young bull (or boar) in a progeny test when prior EBVs are available. The prior EBV may come from a pedigree index, own record or indicator traits. Progeny testing of the highest ranking young bulls on prior EBV, with an equal number of progeny records per bull is close to optimal even when: (1) some bulls are more promising than others based on prior EBV; (2) the bulls are related; and (3) the cost prices of the bulls differ. The latter depends on the assumed distribution of the cost prices, and the algorithm that was derived to account for the differences in cost prices may still prove a useful safeguard against buying too expensive bulls. The algorithm was extended to the situation where inbreeding was reduced by putting a cost on the average relationship among the selected bulls, i.e., G-k (A) over bar was maximized, where Gand (A) over bar are the genetic merit and the average relationship of the selected bulls and k is the cost factor. In an example, the algorithm yielded 11% higher G-k (A) over bar than simply progeny testing the highest ranking bulls based on prior EBV. (C) 1997 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:52:55