We used a comparative mapping approach to identify segments of conserved synteny between human Chromosome 14 (HSA14), bovine Chromosome 21 (BTA21), and the portion of ovine Chromosome 18 (OAR18) that contains the clpg locus. A bovine radiation hybrid map of the region was constructed with available Type II genetic markers and seven candidate genes to establish the comparative interval between BTA21 and HSA14. We developed polymorphic microsatellite and SNP markers associated with five candidate genes and placed them on the ovine and/or bovine genetic maps by multipoint linkage analysis. Three additional genes were mapped by virtue of their physical linkage to genetically mapped makers. Development of integrated linkage and physical maps facilitates the selection of positional candidate genes from the gene rich human map. The physically linked candidate genes PREF-1 and MEG3 map to the interval containing the clpg locus. Comparative biology suggests imprinting of MEG3 and/or the influences of PREF-1 on cellular differentiation, should be examined for their role in the parent-of-origin dependent influence of mutant clpg alleles on sheep muscle characteristics.
Mammalian Genome – Springer Journals
Published: Feb 27, 2014
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