Establishment of consomic strains derived from A/J and SM/J mice for genetic analysis of complex traits

Establishment of consomic strains derived from A/J and SM/J mice for genetic analysis of complex... Consomic strains, in which one chromosome is derived from a donor strain and the other chromosomes are derived from the recipient strain, provide a powerful tool for the dissection of complex genetic traits. In this study we established ten consomic strains (A-2SM, A-6SM, A-11SM, A-12SM, A-13SM, A-15SM, A-17SM, A-18SM, A-19SM, A-YSM) using the SM/J strain as the donor and the A/J strain as the recipient; these are the parental strains of a set of SMXA recombinant inbred (RI) strains that we had developed previously. We analyzed body weights and blood lipid levels in the consomic and parental strains. The mean values for each trait showed a continuous range of variation in the consomic strains suggesting that they are controlled by multiple genes. We previously identified suggestive QTLs for body weight on chromosome 6 in SMXA RI strains and (SM/J × A/J)F2 mice. The observation that the A-6SM consomic strain had a significantly lower mean body weight than the A/J strain supports the presence of this QTL on chromosome 6. Similarly, the higher blood triglyceride level in the A-11SM strain shows the existence of a previously mapped QTL on chromosome 11, and the A-12SM strain provides evidence of a QTL for blood total cholesterol level on chromosome 12. These consomic strains, along with the previously developed set of SMXA RI strains from A/J and SM/J mice, offer an invaluable and powerful resource for the analysis of complex genetic traits in mice. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Establishment of consomic strains derived from A/J and SM/J mice for genetic analysis of complex traits

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Publisher
Springer-Verlag
Copyright
Copyright © 2012 by Springer Science+Business Media New York
Subject
Life Sciences; Cell Biology; Zoology; Anatomy
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s00335-012-9435-x
Publisher site
See Article on Publisher Site

Abstract

Consomic strains, in which one chromosome is derived from a donor strain and the other chromosomes are derived from the recipient strain, provide a powerful tool for the dissection of complex genetic traits. In this study we established ten consomic strains (A-2SM, A-6SM, A-11SM, A-12SM, A-13SM, A-15SM, A-17SM, A-18SM, A-19SM, A-YSM) using the SM/J strain as the donor and the A/J strain as the recipient; these are the parental strains of a set of SMXA recombinant inbred (RI) strains that we had developed previously. We analyzed body weights and blood lipid levels in the consomic and parental strains. The mean values for each trait showed a continuous range of variation in the consomic strains suggesting that they are controlled by multiple genes. We previously identified suggestive QTLs for body weight on chromosome 6 in SMXA RI strains and (SM/J × A/J)F2 mice. The observation that the A-6SM consomic strain had a significantly lower mean body weight than the A/J strain supports the presence of this QTL on chromosome 6. Similarly, the higher blood triglyceride level in the A-11SM strain shows the existence of a previously mapped QTL on chromosome 11, and the A-12SM strain provides evidence of a QTL for blood total cholesterol level on chromosome 12. These consomic strains, along with the previously developed set of SMXA RI strains from A/J and SM/J mice, offer an invaluable and powerful resource for the analysis of complex genetic traits in mice.

Journal

Mammalian GenomeSpringer Journals

Published: Oct 10, 2012

References

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