Document Detail


Efficacy of alternative multivariate best linear unbiased prediction models for genetic evaluation of swine.
MedLine Citation:
PMID:  1752814     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A comparison of the accuracy of alternative BLUP evaluations of swine performance data is reported. A simulated data set of performance for days to market, backfat, number born alive, number weaned, and litter weight in six herds was used for the evaluation. The data structure was derived by using the performance records of six herds sampled from the American Yorkshire Club's STAGES (Swine Testing and Genetic Evaluation System) database. For growth traits, 10,360 pig records from 129 sires and 897 dams were recorded. For maternal traits, records on 2,598 litters of 1,209 sows from 147 sires and 585 dams were included. The actual observed performance of each record was removed and replaced with simulated performance. These simulated data were analyzed by within- and across-herd BLUP models using STAGES and Animal Model (AM) procedures. Results indicate that the alternative BLUP procedures produced similar estimates. Correlations between STAGES and AM EPD ranged from .84 to .95. Correlations between STAGES EPD and true genetic value (G) ranged from .41 to .74, and correlations between AM EPD and G ranged from .40 to .74. On average, AM EPD had a .04 larger correlation with G than did STAGES EPD, although the difference in the correlations was not significant (P greater than .05). Trends in EPD for sires, dams, and pigs or sows were the same. Likewise, standard errors of prediction for AM EPD averaged 4% smaller than those for STAGES EPD. Computationally, the AM procedures used 15 to 20 times as much processing time as did STAGES procedures.
Authors:
D L Lofgren; T S Stewart
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of animal science     Volume:  69     ISSN:  0021-8812     ISO Abbreviation:  J. Anim. Sci.     Publication Date:  1991 Nov 
Date Detail:
Created Date:  1992-01-29     Completed Date:  1992-01-29     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  8003002     Medline TA:  J Anim Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  4388-96     Citation Subset:  IM    
Affiliation:
Purdue University, West Lafayette, IN 47907.
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MeSH Terms
Descriptor/Qualifier:
Animals
Breeding*
Female
Male
Models, Genetic*
Phenotype
Swine / genetics*
Weaning

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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