Linked Life Data

10629824

Source:http://linkedlifedata.com/resource/pubmed/id/10629824

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2000-1-27
pubmed:abstractText
Genetic evaluations of Holstein bulls for February 1997 through May 1998 were examined to determine the value of more frequent evaluation for quicker identification of bulls with changing predicted transmitting abilities (PTA) and of new bulls of superior genetic merit. Changes in PTA between evaluations that were calculated quarterly rather than semiannually were reduced by 30%. About two-thirds of PTA were closer to PTA that were calculated 3 mo later than were PTA calculated 3 mo earlier. Improvements in accuracy were 94 to 96% for a subset of bulls with substantial PTA changes from 3 mo before to 3 mo after an evaluation. With quarterly evaluation, half of the bulls had initial PTA available 3 mo sooner than with semiannual evaluation, and those PTA were better predictors of later PTA than were the parent averages that would have remained the best genetic estimates for 3 mo longer. Correlations of parent averages with PTA about a year later were 0.5 to 0.6, whereas correlations with later PTA were about 0.8 for initial PTA and 0.9 for second PTA. Although later PTA are expected to be improved estimates of true genetic merit, the timely results provided by quarterly evaluation were useful in identifying bulls with PTA that changed substantially and in identifying top new bulls.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0022-0302
pubmed:author
pubmed:issnType
Print
pubmed:volume
82
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2766-70
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Examination of more frequent genetic evaluations for dairy bulls.
pubmed:affiliation
Animal Improvement Programs Laboratory, ARS, USDA, Beltsville, MD 20705-2350, USA.
pubmed:publicationType
Journal Article