Linkage disequilibrium between the ELA and the A blood group systems in Standardbred horses.
The linkage group formed by the ELA and A blood group system in horses was studied in American Standardbred horses. The distance between the ELA locus and the A blood group locus was measured as 1.61 centimorgans, observing only the haplotypes contributed by the sires. Strong linkage disequilibrium was found in pacing Standardbred horses for ELA-W1 with Aa, ELA-W5 with Ab and ELA-W10 with Ab. Linkage disequilibrium was apparent at both the population and family level. Among trotting Standardbred horses, linkage disequilibrium was found for ELA-W1 with Aa and for ELA-W10 with Ab. It was not possible to investigate linkage relationships in Thoroughbred horses because of the high frequency of Aa and low frequency of other A system markers.
D000818:Animals; D001789:Blood Group Antigens / Q000235:genetics*; D005796:Genes; D008040:Genetic Linkage; D005819:Genetic Markers; D006649:Histocompatibility Antigens / Q000235:genetics*; D006736:Horses / Q000235:genetics*
D001789:Blood Group Antigens; D005819:Genetic Markers; D006649:Histocompatibility Antigens