Show simple item record

dc.contributor.authorKoduru, Vijaya Kumar Reddy
dc.date.accessioned2014-03-04T02:27:32Z
dc.date.available2014-03-04T02:27:32Z
dc.date.issued2006-12
dc.identifier.otherkoduru_vijaya_k_200612_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/koduru_vijaya_k_200612_ms
dc.identifier.urihttp://hdl.handle.net/10724/23661
dc.description.abstractThe purpose of this study was to investigate the changes of predictive transmitting abilities (PTAs) and PTA trends for final score, from 1st to 2nd crop of daughters for Holstein sires. The PTAs were estimated from 2 datasets: D01 (records classified up to 2001) and D05 (records classified up to 2005). PTA change was the difference between D01 and D05 evaluations. A variety of alternative models were investigated to reduce the PTA changes and to reduce the differences between 1st and 2ndcrop trends of both PTA and MS. Allowing separate unknown parent groups for sires and dams together with additional pedigrees reduced the mean PTA change from -0.33, with single trait model, to -0.12. And, reduced the percent of sires showing drops from 74.5% to 56.4%, minimized the differences between 1st and 2nd crop trends.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectFINAL SCORE
dc.subjectHOLSTEIN,PTA
dc.subjectTRENDS
dc.titleChanges in genetic evaluations from 1st to 2nd crop for final score in Holsteins
dc.typeThesis
dc.description.degreeMS
dc.description.departmentAnimal and Dairy Science
dc.description.majorAnimal Science
dc.description.advisorIgnacy Misztal
dc.description.committeeIgnacy Misztal
dc.description.committeeJ. Keith Bertrand
dc.description.committeeSamuel Aggrey
dc.description.committeeRomdhane Rekaya


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record