LEOGEN
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  • ABOUT
    • Some Background
    • Some History
    • Some Current Data
  • Why Now?
    • Loss of Diversity
    • Population
  • The First Step
    • Who
    • Who Else
    • The Plan
    • In Detail
  • Outcrossing
  • The Next Step
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LEOGEN - THE LEONBERGER GENETIC DIVERSITY PROJECT

                        Population . . .

Worldwide Leonberger Population Analysis

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  • The broad use of popular sires over the years led to no separate national populations.
  • All modern lines across the world are closely related
  • Mitochondrial genome diversity is also poor
 
Pie charts below clearly illustrate the popular sire syndrome.
Males that produced at least 33 puppies were considered popular sires. They account for a quarter of all breeding males. These sires are responsible for producing two thirds of all offspring.

Picture
Picture
Multidimensional scaling analysis of worldwide Leonberger population structure
The graph shows 1203 Leos with genetic data showing high relatedness between all dogs and no obvious subpopulations regardless of the geographical region of residence.
The 1203 dogs genotyped on SNP arrays represented the Leonberger population well because they were sampled throughout time and from various countries.
Subpopulations were expected due to the large geographic distances between the dogs.
 
 579 samples (48.1%) came from the USA and Canada
 602 samples (50.1%) came from European countries
 22 samples (1.8%) came from Australia, New Zealand, or Japan.
 
However, multidimensional scaling (MDS) of pairwise genetic distances revealed no obvious clustering.



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  • HOME
  • ABOUT
    • Some Background
    • Some History
    • Some Current Data
  • Why Now?
    • Loss of Diversity
    • Population
  • The First Step
    • Who
    • Who Else
    • The Plan
    • In Detail
  • Outcrossing
  • The Next Step
  • PROJECT UPDATES
  • Make A Donation
    • Fundraising
  • FAQ's
  • Contact Us