Abstract:
:A parallel testing of 4803 routine Quarter Horse parentage cases, using 15 loci of blood group and protein polymorphisms (blood typing) and 11 loci of dinucleotide repeat microsatellites (DNA typing), validated DNA markers for horse pedigree verification. For the 26 loci, taken together, the theoretical effectiveness of detecting incorrect parentage was 99.999%, making it extremely unlikely that false parentage would fail to be recognized. The tests identified incorrect parentage assignment for 95 offspring (2% of cases). Despite fewer loci, DNA typing was as effective as blood typing and, in parentage exclusion cases, provided more systems to substantiate the genetic incompatibility. Five offspring presented potential genetic incompatibilities with their parents in only a single microsatellite system, but the parentage exclusions could not be confirmed with discordant results at additional loci. Two of these five incompatibilities could be explained as consequences of a null allele and three as fragment size increases or decreases (putative mutations). Provided that an exclusion assignment was based on at least two systems of genetic incompatibility, such rare genetic events did not lead to false exclusions. Notwithstanding the near 100% effectiveness estimations for either typing panel alone to identify incorrect parentage, this validation test showed an actual effectiveness of 97.3% for blood typing and 98.2% for DNA typing. The DNA-based test, however, may feasibly achieve higher efficacy than reported here by adding selected systems to the parentage test panel.
journal_name
Anim Genetjournal_title
Animal geneticsauthors
Bowling AT,Eggleston-Stott ML,Byrns G,Clark RS,Dileanis S,Wictum Edoi
10.1111/j.1365-2052.1997.00123.xsubject
Has Abstractpub_date
1997-08-01 00:00:00pages
247-52issue
4eissn
0268-9146issn
1365-2052journal_volume
28pub_type
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