About: Evolution and trans-species polymorphism of MHC class IIB genes in cyprinid fish     Goto   Sponge   NotDistinct   Permalink

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  • The polymorphism of DAB genes encoding MHC IIb was investigated in 11 cyprinid species from central Europe.The species belonged to four subfamilies: Cyprininae, Tincinae, Gobioninae and Leuciscinae. Two paralogous groups of sequences, DAB1 and DAB3, were recognised according to the similarity of their nucleotide and amino-acid sequences and from phylogenetic analyses using either partial exon 2 or partial exon 3 sequences. A high allelic variability among species was found for exon 2, indicating extensive MHC polymorphism. Time divergence estimation supports the separation of DAB1 and DAB3 groups predating the separation into fish subfamilies, and a cyprinid origin of the DAB genes. Phylogenetic trees using exon 2 support the hypothesis of trans-species polymorphism, which appears to be limited to the subfamily level, i.e. the presence of sequences from different species in the same allelic group was more often recognised within subfamilies Cyprininae and Leuciscinae than between them.
  • The polymorphism of DAB genes encoding MHC IIb was investigated in 11 cyprinid species from central Europe.The species belonged to four subfamilies: Cyprininae, Tincinae, Gobioninae and Leuciscinae. Two paralogous groups of sequences, DAB1 and DAB3, were recognised according to the similarity of their nucleotide and amino-acid sequences and from phylogenetic analyses using either partial exon 2 or partial exon 3 sequences. A high allelic variability among species was found for exon 2, indicating extensive MHC polymorphism. Time divergence estimation supports the separation of DAB1 and DAB3 groups predating the separation into fish subfamilies, and a cyprinid origin of the DAB genes. Phylogenetic trees using exon 2 support the hypothesis of trans-species polymorphism, which appears to be limited to the subfamily level, i.e. the presence of sequences from different species in the same allelic group was more often recognised within subfamilies Cyprininae and Leuciscinae than between them. (en)
Title
  • Evolution and trans-species polymorphism of MHC class IIB genes in cyprinid fish
  • Evolution and trans-species polymorphism of MHC class IIB genes in cyprinid fish (en)
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  • Evolution and trans-species polymorphism of MHC class IIB genes in cyprinid fish
  • Evolution and trans-species polymorphism of MHC class IIB genes in cyprinid fish (en)
skos:notation
  • RIV/00216224:14310/05:00012368!RIV10-GA0-14310___
http://linked.open...avai/riv/aktivita
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  • P(GA524/04/1128)
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  • 3
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  • 520810
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  • RIV/00216224:14310/05:00012368
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  • Cyprinid species; MHC evolution; DAB genes; Diversifying and purifying selection; Molecular adaptation (en)
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  • GB - Spojené království Velké Británie a Severního Irska
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  • [B66A71D1181D]
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  • Fish and Shellfish Immunology
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  • 18
http://linked.open...iv/tvurceVysledku
  • Vetešníková Šimková, Andrea
  • Gelnar, Milan
  • Martin, Jean-Francois
  • Ottová, Eva
  • Morand, Serge
  • Allienne, Jean-Francois
  • Gouy de Bellocq, Joelle
issn
  • 1050-4648
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  • 14310
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