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dc.contributor.authorBhatnagar, Adrienne Shardaen_US
dc.date.accessioned2014-03-14T20:44:21Z
dc.date.available2014-03-14T20:44:21Z
dc.date.issued2010-08-18en_US
dc.identifier.otheretd-08272010-140539en_US
dc.identifier.urihttp://hdl.handle.net/10919/34811
dc.description.abstractFoal scores from the International Sporthorse Registry and Oldenburg Registry North America were used for statistical and genetic analysis. Scored traits include type and conformation (TC), athletic ability of movement (AM), overall development as related to age (OD), and total score (TS) calculated as a weighted average of TC, AM, and OD. Premium status (PS) was analyzed as a binary trait. Preliminary statistical analysis determined significant fixed effects of sex, year of birth, dam breed, and inspection period. Offspring of stallions with only one offspring in the dataset and non-warmblood sires were deleted. Non-warmblood or non-Thoroughbred dams were also removed. Variance components were estimated using ASReml methodology to obtain genetic parameters. Traits were moderately to highly heritable with heritabilities of 0.45, 0.47, 0.49, and 0.55 for TC, AM, OD, and TS, respectively. PS had a heritability of 0.32 on a binary scale and 0.51 when transformed to the normal scale. Genetic correlations between TC, AM, OD, and TS were all high and favorable, ranging from 0.80 to 0.99. Genetic correlations with PS were inestimable. Foal inspection scores are heritable and should respond to selection. Selection for improvement in one trait should result in improvement in all traits. If genetic parameters can be correlated to data obtained in older horses, incorporating foal scores in selection decisions could improve warmblood breeding programs. Utilizing foal inspection scores should be beneficial to breeding objectives of the International Sporthorse Registry and Oldenburg Registry North America.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartBhatnagar_AS_T_2010.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectmovementen_US
dc.subjecthorseen_US
dc.subjectconformationen_US
dc.subjectwarmblooden_US
dc.subjectheritabilityen_US
dc.titleGenetic Parameters of Foal Inspection Scores in the International Sporthorse Registry and Oldenburg Registry North Americaen_US
dc.typeThesisen_US
dc.contributor.departmentAnimal and Poultry Sciencesen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineAnimal and Poultry Sciencesen_US
dc.contributor.committeechairSplan, Rebecca K.en_US
dc.contributor.committeememberNotter, David R.en_US
dc.contributor.committeememberSchacht, Christian E. M.en_US
dc.contributor.committeememberLewis, Ronald M.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08272010-140539/en_US
dc.date.sdate2010-08-27en_US
dc.date.rdate2010-09-14
dc.date.adate2010-09-14en_US


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