Standardbred stallion gene transmission for twelve protein systems: evidence for selection in trotters.
The transmission ratios of alleles at 12 protein marker loci were computed individually for American Standardbred stallions in a genealogy of 5392 phenotyped horses. Over all loci there was significant gene transmission distortion for trotting stallions (p = 0.0019) but not for pacing stallions (p = 0.99). The transmission distortion was due to sire-specific effects (p = 0.0024) and not to increased transmission of one or the other allele of a given heterozygous genotype (p = 0.21). Individual-specific, non-random transmission of homologous chromosomes may provide a mechanism for selection to operate without requiring differential fitness for specific alleles or genotypes in the population as a whole.
Weitkamp
L R
LR
Department of Psychiatry, University of Rochester Medical Center, New York 14642.
MacCluer
J W
JW
Guttormsen
S A
SA
King
R H
RH
D000818:Animals; D001769:Blood; D005684:Gait; D005819:Genetic Markers; D005838:Genotype; D006579:Heterozygote; D006736:Horses / Q000235:genetics*; D008297:Male; D010375:Pedigree; D012641:Selection, Genetic
D005819:Genetic Markers