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Related Experiment Videos

Major histocompatibility complex class I polymorphism in Asiatic lions.

M Sachdev1, R Sankaranarayanan, P Reddanna

  • 1Center for Cellular and Molecular Biology, Hyderabad, Andhra Pradesh, India.

Tissue Antigens
|June 29, 2005
PubMed
Summary

Wild Asiatic lions in India

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Area of Science:

  • Conservation genetics
  • Immunogenetics
  • Zoology

Background:

  • Asiatic lions (Panthera leo persica) are endangered and reside solely in India's Gir forest.
  • Concerns exist regarding their narrow genetic diversity and inbreeding, impacting survivability.
  • Assessing immune gene diversity is crucial for conservation strategies.

Purpose of the Study:

  • To objectively assess genetic diversity in the major histocompatibility complex (MHC) class I immune loci of Asiatic lions.
  • To compare genetic diversity between wild, captive-bred, and hybrid Asiatic lion populations.
  • To evaluate the hypothesis of high inbreeding in wild Asiatic lions.

Main Methods:

  • Polymorphism chain reaction-assisted sequence-based typing was used to analyze MHC class I (exons 2 and 3).
  • DNA from wild Asiatic, captive-bred Asiatic, and Afro-Asiatic hybrid lions was sequenced and analyzed.
  • Nucleotide and translated product sequence polymorphism was compared across groups.

Main Results:

  • Extensive sequence polymorphism was found in MHC class I loci, even within individual lions.
  • Wild Asiatic lions exhibited abundant MHC class I polymorphism, comparable to hybrid lions.
  • Genetic diversity in wild Asiatic lions was significantly higher than in captive-bred populations.

Conclusions:

  • Wild Asiatic lions in Gir forest are likely not as highly inbred as previously assumed.
  • They possess substantial genetic diversity at MHC class I loci, crucial for immune function and adaptation.
  • The study identified 52 new MHC class I sequences in Asiatic lions, enriching genetic resources.

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