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  • 1
    Electronic Resource
    Electronic Resource
    GENETIC STUDIES IN INBRED RATS. VI. LINKAGE RELATIONSHIPS OF MIXED LYMPHOCYTE REACTIVITY, SEROLOGICALLY DEFINED ANTIGENS (Ag-B, Ag-C) AND THE IMMUNE RESPONSE TO POLY(Glu52Lys33Tyr15) (1976)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of immunogenetics 3 (1976), S. 0 
    Details
    ISSN: 1744-313X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The Ag-B allotype, mixed lymphocyte reactivity (MLR) and the immune response to poly(Glu52Lys33Tyr15) were assayed in male rats from the F2 hybrid and two back-cross generations of the F344 and DA strains in order to investigate the structure of the rat major histocompatibility complex. No disparity between Ag-B type and mixed lymphocyte reactivity was found in 263 animals. The immune response to poly(Glu52Lys33Tyr15) was closely linked to the Ag-B locus, and both antibody production and the delayed hypersensitivity response were under polygenic control. These results suggest that the genetic loci which determine these responses in the rat are closely linked and that recombinational events between the Ag-B and MLR loci are infrequent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1744-313X.1976.tb00556.x
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic and immunological characterization of naturally occurring recombinant B3 rats (1977)
    Springer
    Immunogenetics 5 (1977), S. 271-283 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The B-stock population of rats was bred for homozygosity at the loci controlling coat color. In this process, theAg-B1 andAg-B3 haplotypes became fixed in Hardy-Weinberg equilibrium. Extensive immunization and absorption studies showed that the specificities in the B-stock rats homozygous for theAg-B1 haplotype were the same as those found in the inbred F344 strain (Ag-B1), and that the specificities in the rats homozygous for theAg-B3 haplotype were the same as those found in the inbred BN (Ag-B3) strain. A homozygous line derived from the rats carrying theAg-B3 haplotype (B3) has the mixed lymphocyte reactivity and antibody responsiveness to poly (Glu52Lys33Tyr15) characteristic of the inbred strains in theAg-B4 group. Thus, it represents a naturally occurring recombination between the loci controlling MLR and immune responsiveness, on the one hand, and those controlling the Ag-B antigens on the other. Antibody responsiveness segregated with theAg-B3 haplotype in crosses between the B3 homozygotes and the low responder BUF and M520 strains; hence, this recombination is a stable one. There was no linkage of antibody formation or haplotype to coat color. The finding of a strain with a naturally occurring recombination in the major histocompatibility complex between the loci controlling mixed lymphocyte reactivity and the Ag-B histocompatibility antigens provides evidence for the separateness of these loci. Since the portion of the genetically determined mechanism controlling antibody responsiveness which is linked to the MHC was that characteristic of the MLR type, it too must lie outside the region defined by the serological specificities of theAg-B haplotype.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570482
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  • 3
    Electronic Resource
    Electronic Resource
    Linkage disequilibrium between two genetic loci of the major histocompatibility complex in rats (1979)
    Springer
    Immunogenetics 9 (1979), S. 157-164 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The major histocompatibility complex (MHC) in natural populations of rats is composed of genetic phenotypes that are similar, if not identical, to those seen in inbred laboratory strains. Examination of individual wild rats from a single location in the city of Pittsburgh, Pennsylvania, resulted in the identification of seven different RT1.A histocompatibility serotypes and three RT1.B mixed lymphocytes responses. In this population of animals there is a significant association (p 〈 0.005) between four RT1.A and RT1.B phenotypic pairs: RT1.A8B1, RTl.AkBn, RTl.AdBa and RT1.A1Ba. The observed values for linkage disequilibrium (0.211,0.076,0.070 and 0.085, respectively) are very high and are close to the maximum expected, given the individual allelic frequencies. Although the animals included in this study were obtained from one location, agreement with Hardy-Weinberg equilibrium is demonstrated for other loci in the same population. The demonstration of equilibrium suggests that significant inbreeding is not affecting this population of rats. Not enough is known about the allelic frequencies in surrounding rat populations to determine how important the effect of migration is on these disequilibrium values. The large linkage disequilibria may indicate that, in the rat, environmental selective forces are operating to ensure the nonrandom association of separate components of the MHC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01570406
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    Paper (German National Licenses)
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