Genetic characterization of a new set of recombinant inbred lines (LGXSM) formed from the intercross of SM/J and LG/J inbred mouse strains

Genetic characterization of a new set of recombinant inbred lines (LGXSM) formed from the... A new set of LGXSM recombinant inbred (RI) strains is presented. The RI strain panel consists of 18 remaining strains of the original 55 founding strains. Strain characterization is based on 506 polymorphic microsatellites and 4289 single nucleotide polymorphisms (SNPs) distributed across the genome. Average microsatellite intermarker distance is 4.80 ± 4.84 Mb or 2.91 ± 3.21 F2 cM. SNPs are more densely spaced at 0.57 ± 1.27 Mb. Ninety-five percent of all microsatellite intermarker intervals are separated by less than 15.00 Mb or 8.50 F2 cM, while 95% of the SNPs are less than 0.95 Mb apart. Strains show expected low levels of nonsyntenic association among loci and complete genomic independence. During inbreeding, the RI strains went through strong natural selection on the agouti locus on Chromosome 2, especially when the epistatically interacting tyrosinase locus on Chromosome 7 carried the wild-type allele. The LG/J and SM/J strains differ in a large number of biomedically important traits, and they and their intercross progeny have been used in multiple mapping studies. The LG×SM RI strain panel provides a powerful new resource for mapping the genetic bases of complex traits and should prove to be of great biomedical utility in modeling complex human diseases such as obesity and diabetes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Genetic characterization of a new set of recombinant inbred lines (LGXSM) formed from the intercross of SM/J and LG/J inbred mouse strains

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Publisher
Springer-Verlag
Copyright
Copyright © 2006 by Springer Science+Business Media, Inc.
Subject
Life Sciences; Anatomy; Zoology; Cell Biology
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s00335-005-0038-7
Publisher site
See Article on Publisher Site

Abstract

A new set of LGXSM recombinant inbred (RI) strains is presented. The RI strain panel consists of 18 remaining strains of the original 55 founding strains. Strain characterization is based on 506 polymorphic microsatellites and 4289 single nucleotide polymorphisms (SNPs) distributed across the genome. Average microsatellite intermarker distance is 4.80 ± 4.84 Mb or 2.91 ± 3.21 F2 cM. SNPs are more densely spaced at 0.57 ± 1.27 Mb. Ninety-five percent of all microsatellite intermarker intervals are separated by less than 15.00 Mb or 8.50 F2 cM, while 95% of the SNPs are less than 0.95 Mb apart. Strains show expected low levels of nonsyntenic association among loci and complete genomic independence. During inbreeding, the RI strains went through strong natural selection on the agouti locus on Chromosome 2, especially when the epistatically interacting tyrosinase locus on Chromosome 7 carried the wild-type allele. The LG/J and SM/J strains differ in a large number of biomedically important traits, and they and their intercross progeny have been used in multiple mapping studies. The LG×SM RI strain panel provides a powerful new resource for mapping the genetic bases of complex traits and should prove to be of great biomedical utility in modeling complex human diseases such as obesity and diabetes.

Journal

Mammalian GenomeSpringer Journals

Published: Jan 1, 2005

References

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