ORBi: Culbertson M. S. - Estimation of dominance variance in purebred Yorkshire swine

Reference : Estimation of dominance variance in purebred Yorkshire swine


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Genetics & genetic processes Life sciences : Animal production & animal husbandry
	To cite this reference:	http://hdl.handle.net/2268/22671

Title :	Estimation of dominance variance in purebred Yorkshire swine
Language :	English
Author, co-author :	Culbertson, M. S. [> > > >]
	Mabry, J. W. [> > > >]
	Misztal, I. [> > > >]
	Gengler, Nicolas [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech >]
	Bertrand, J. K. [ > > ]
	Varona, L. [> > > >]
Publication date :	1998
Journal title :	Journal of Animal Science
Publisher :	American Society of Animal Science
Volume :	76
Issue/season :	2
Pages :	448-451
Audience :	International
ISSN :	0021-8812
e-ISSN :	1525-3163
City :	Savoy
Country :	IL
Keywords :	[en] pigs ; inbreeding ; dominance ; genetic parameters
Abstract :	[en] We used 179,485 Yorkshire reproductive and 239,354 Yorkshire growth records to estimate additive and dominance variances by Method Fraktur R. Estimates were obtained for number born alive (NBA), 21-d litter weight (LWT), days to 104.5 kg (DAYS), and backfat at 104.5 kg (BF). The single-trait models for NBA and LWT included the fixed effects of contemporary group and regression on inbreeding percentage and the random effects mate within contemporary group, animal permanent environment, animal additive, and parental dominance. The single-trait models for DAYS and BF included the fixed effects of contemporary group, sex, and regression on inbreeding percentage and the random effects litter of birth, dam permanent environment, animal additive, and parental dominance. Final estimates were obtained from six samples for each trait. Regression coefficients for 10% inbreeding were found to be -.23 for NBA, -.52 kg for LWT, 2.1 d for DAYS, and 0 mm for BF. Estimates of additive and dominance variances expressed as a percentage of phenotypic variances were, respectively, 8.8 +/- .5 and 2.2 +/- .7 for NBA, 8.1 +/- 1.1 and 6.3 +/- .9 for LWT, 33.2 +/- .4 and 10.3 +/- 1.5 for DAYS, and 43.6 +/- .9 and 4.8 +/- .7 for BF. The ratio of dominance to additive variances ranged from .78 to .11.
Permalink :	http://hdl.handle.net/2268/22671

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