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MHC variation in birds and reptiles

Author:
  • Håkan Wittzell
  • Thomas Madsen
  • Helena Westerdahl
  • R. Shine
  • Torbjörn von Schantz
Publishing year: 1998
Language: English
Pages: 301-309
Publication/Series: Genetica
Volume: 104
Issue: 3
Document type: Journal article
Publisher: Kluwer

Abstract english

The major histocompatibility complex (MHC) has been studied in a multitude of mammals by now, but much less is known about its organisation and variation in other vertebrate species. The mammalian MHC is organised as a single gene cluster, but recent studies on birds suggest that this paradigm of MHC organisation has to be supplemented. The domestic chicken thus possesses two separate gene clusters which both contain MHC class I and class II B genes, and we have shown that the ring-necked pheasant Phasianus colchicus also has two unlinked clusters of class II B genes. We are studying the effect of the MHC on mate choice, survival and reproductive success in natural populations of birds and reptiles. For this reason, we are developing DNA techniques to determine the animals' MHC genotype. The amplification of the hypervariable exon 3 of the class I gene from songbirds and reptiles has provided us with species specific probes that can be used in Southern blot analysis. The first results indicate very extensive variation in all studied species, that is starlings Sturnus vulgaris, great reed warblers Acrocephalus arundinaceus and water pythons Liasis fuscus. The restriction fragment length polymorphism (RFLP) analysis also suggests that the number of MHC genes is significantly larger in these species than in pheasants and domestic chickens.

Keywords

  • Biological Sciences
  • reptiles
  • major histocompatibility complex
  • class-i molecules
  • rfp-y
  • nucleolar
  • organizer
  • mating preferences
  • population biology
  • genetic variation
  • chicken mhc
  • sequences
  • b-gene
  • polymorphism
  • birds
  • evolution

Other

Published
  • Avian MHC genes
  • Molecular Ecology and Evolution Lab
  • ISSN: 1573-6857
Helena Westerdahl
E-mail: helena [dot] westerdahl [at] biol [dot] lu [dot] se

Senior lecturer

MEMEG

+46 46 222 36 69

E-C250

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Research group

Molecular Ecology and Evolution Lab

Projects

Doctoral students and postdocs

Research fellows

Postdocs

Luz Garcia-Longoria

PhD students, main supervisor

Samantha Mellinger

PhD students, assistant supervisor

Gustaf Ekelund Ugge

Helena Westerdahl w house sparrow