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  • Title: Improved resolution of the comparative horse-human map: investigating markers with in silico and linkage mapping approaches.
    Author: Tozaki T, Swinburne J, Hirota K, Hasegawa T, Ishida N, Tobe T.
    Journal: Gene; 2007 May 01; 392(1-2):181-6. PubMed ID: 17306472.
    Abstract:
    Genetic maps are extremely important tools for tracing the genes that govern economically significant traits, and microsatellites are a significant component of these. In this study, we isolated 2346 novel horse microsatellites as resources for the construction of high-density horse genetic maps. Of these 2346 markers, 339 (14.5%) horse sequences showed sequence homology to DNA sequences in the human genome, demonstrating that microsatellites as type II markers are valuable resources for developing linkage maps and that they have a potential equal to that of type I markers for developing comparative maps. Of the 339 markers, 206 (60.8%) were assigned to horse chromosomes using the Animal Health Trust (AHT) full-sib reference family, and 195 (94.6%) of these localized to the expected syntenic locations on the human genome. These results confirmed the high level of accuracy of in silico mapping. Thus, the 339 markers that exhibited homology to the human genome increased the density of markers on the horse-human comparative map. The resulting comparative map will facilitate the use of horse microsatellites as genetic markers for the identification of quantitative trait loci (QTL) that have been mapped on the human genome. In addition, although the in silico and linkage mapping data did not agree for the other 11 (5.4%) of the assigned 206 markers, these may represent new putative regions of horse-human synteny.
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