Reminder: Login to access new features and members-only content!

Register to be a member of our community. Its easy!

Register a new account

Already a member?

Log In here!


Did you find our content interesting or helpful? Help support the IPFD enhance health, well-being and welfare for dogs everywhere.

Jump to content
International Partnership for Dogs - Enhancing Dog Health, Well-Being, and Welfare - Join Us
Search In
  • More options...
Find results that contain...
Find results in...

Molecular Genetics of Sex Identification, Breed Ancestry and Polydactyly in the Norwegian Lundehund Breed

    This paper describes genetic analysis of a breed facing significant challenges: the Norwegian Lundehund.


    See the paper here.


    Some of this work was described at the 2nd International Dog Health Workshop by Prof. JT Epplen, one of the authors.


    Although unique in many ways, the situation in the Lundehund is one to be considered thoughtfully by all in the dog breeding world.
    This is an ancient breed - first developed 5 centuries ago - and it is now endangered.


    See a few excerpts from the research paper below:

    The Norwegian Lundehund breed of dog has undergone a severe loss of genetic diversity as a result of inbreeding and epizootics of canine distemper. As a consequence, the breed is extremely homogeneous and accurate sex identification is not always possible by standard screening of
    X-chromosomal loci. To improve our genetic understanding of the breed we genotyped 17 individuals using a genome-wide array of 170 000 single nucleotide polymorphisms (SNPs). Standard analyses based on expected homozygosity of X-chromosomal loci failed in assigning individuals to the correct sex, as determined initially by physical examination and confirmed with the Y-chromosomal marker, amelogenin. This demonstrates that identification of sex using standard SNP assays can be erroneous in highly inbred individuals.


    Subject area: Genomics and gene mapping
    Key words: ancestors, mtDNA, Norwegian Lundehund, polydactyly, sex identification, Y chromosome"


    From the introduction:


    "The Norwegian Lundehund is an endangered small Spitz breed which has gone through at least 2 known severe genetic bottlenecks
    (Melis et al. 2013). It was developed to hunt puffins (Fratercula arctica) on steep cliffs in Northern Norway 5 centuries ago (Espelien
    2012), and is characterized by unique breed-defining traits such as a great flexibility of joints and neck as well as the presence of extra
    toes in the fore and hind limbs (polydactyly; Park et al. 2008; Melis et al. 2013)."


    From the Discussion:


    "Y-chromosomal and mtDNA results of the “German” data set suggest that the current Lundehund population in Norway has 1
    male and 1 female ancestor. Potentially, this observation only provides the minimum estimated number of male and female ancestors.
    It is for example possible that several Lundehund males with identical Y-chromosomal haplotypes contributed. In addition, we only investigated
    parts of the mt genome which could lead to an underestimation of the number of female founders as described ( Pang et al. 2009 )."




    "According to our results, the Lundehund breed is an exceptional animal model for monogenic diseases such as polydactyly, which appears to be caused by the same intronic mutation in the preZRS of LMBR1 gene as in the Western dog breeds Beagle, Cocker Spaniel, Malinois, Rottweiler, Shetland Sheepdog, Standard Poodle, Standard Schnauzer, Shih Tzu, and Yorkshire Terrier (Park et al. 2008 ) ."




    Also see DWN's Norwegian Lundehund page:


  Report Entry

User Feedback

Recommended Comments

There are no comments to display.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Add a comment...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.