title: Mus spretus LINE-1 sequences detected in the Mus musculus inbred strain C57BL/6J using LINE-1 DNA probes.
abstract: The inbred mouse strain, C57BL/6J, was derived from mice of the Mus musculus complex. C57BL/6J can be crossed in the laboratory with a closely related mouse species, M. spretus to produce fertile offspring; however there has been no previous evidence of gene flow between M. spretus and M. musculus in nature. Analysis of the repetitive sequence LINE-1, using both direct sequence analysis and genomic Southern blot hybridization to species-specific LINE-1 hybridization probes, demonstrates the presence of LINE-1 elements in C57BL/6J that were derived from the species M. spretus. These spretus-like LINE-1 elements in C57BL/6J reveal a cross to M. spretus somewhere in the history of C57BL/6J. It is unclear if the spretus-like LINE-1 elements are still embedded in flanking DNA derived from M. spretus or if they have transposed to new sites. The number of spretus-like elements detected suggests a maximum of 6.5% of the C57BL/6J genome may be derived from M. spretus.
authors.affiliation: Department of Biochemistry, University of Texas Health Science Center at San Antonio 78284-7760, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Rikke
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: L P
authors.initials: LP
authors.lastname: Daggett
authors.forename: R
authors.initials: R
authors.lastname: Reyes
authors.forename: S C
authors.initials: SC
authors.lastname: Hardies
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D015139:Blotting, Southern; D003433:Crosses, Genetic; D015342:DNA Probes; D051379:Mice; D008810:Mice, Inbred C57BL / Q000235:genetics*; D008969:Molecular Sequence Data; D009115:Muridae / Q000235:genetics*; D010802:Phylogeny; D012091:Repetitive Sequences, Nucleic Acid / Q000235:genetics*; D017422:Sequence Analysis, DNA
chemical_list: D015342:DNA Probes