The Institute of Canine Biology
  • HOME
  • Blog
  • Breed Preservation
    • Breed Status
    • Breeding for the future >
      • BFF Breed Groups
    • The "Elevator Pitch"
    • What's in the Gene Pool?
    • The Pox of Popular Sires
    • What population genetics can tell us about a breed
    • What population genetics can tell you...Tollers & Heelers >
      • More details about the Toller study
    • How population size affects inbreeding
    • Finding the genes without DNA
    • Global Pedigree Project >
      • The Database
    • How to use kinship data
    • Using EBVs to breed better dogs >
      • EBV Examples
    • How to read a dendrogram
    • How to read a heat map
  • Projects
    • How To Interpret Breed Analyses
    • Afghan Hound
    • Belgian Tervuren >
      • Belgian Terv p2
      • Belgians- why population size matters
    • Bernese Mountain Dog
    • Boxer
    • Brussels Griffon
    • Bullmastiff
    • Canaan Dog >
      • Canaan analyses
    • Cesky Terrier >
      • Cesky genetic history
    • Chinook
    • Curly-coated Retriever
    • Doberman
    • Entelbucher Mountain Dog
    • Flatcoat Retriever
    • French Bulldog
    • German Shorthair
    • Golden Retriever >
      • Golden Retriever Pedigree Charts
    • Irish Water Spaniel >
      • IWS (6 Nov 17)
    • Labrador Retriever
    • Manchester Terrier
    • Mongolian Bankhar >
      • Research Updates
      • Bankhar 1
    • Norwegian Lundehund
    • Plummer Terrier
    • Otterhound
    • Portuguese Water Dog >
      • Portuguese Water Dog (pt 2)
    • Ridgeback
    • Schipperke
    • Standard Poodle >
      • The Problem With Poodles
      • 3poodle pedigree charts
      • 3Poodle Wycliff dogs
      • Poodle Genetics
    • Tibetan Spaniel
    • Tibetan Mastiff
    • West Highland White Terrier
    • Whippet
    • Wirehaired Pointing Griffons
    • UK KC Graphs >
      • UK KC Breed Status
      • UK Groups
      • KC Gundogs
      • KC Hounds
      • KC Terriers >
        • Terriers (select breeds)
      • KC Pastoral
      • KC Toys
      • KC Working
      • KC Utility
      • Australian KC
    • Breed outcrossing programs
  • Health Data
    • Genetic disorders by Breed
    • UK KC 2004 Survey
    • Bloat (Purdue Study)
    • Body Condition Score >
      • % Dysplastic vs BCS
    • Breed Comparions
    • Cancer
    • Cardiac
    • Cataracts
    • Caesareans
    • Deafness
    • Degenerative Myelopathy
    • Elbow Dysplasia
    • Epilepsy
    • Genetic Diversity
    • Genetic Diversity (MyDogDNA)
    • Hip Dysplasia >
      • Hip Dysplasia (Hou et al 2013)
    • Inbreeding Effects
    • Inbreeding (Gubbels)
    • Inbreeding (Dreger)
    • Lifespan
    • Litter size
    • Metabolic
    • mtDNA
    • Orthopedic
    • Mode of Inheritance
    • Patella Luxation
    • Thyroid
    • Portosystemic shunt
    • Purebred vs Mixed (UC Davis)
    • Purebred vs Mixed Breed (Bonnett)
    • Spay & Neuter Effects
    • Calboli et al 2008
    • Hodgman (1963)
    • Scott & Fuller (1965)
    • Stockard: Purebred crosses
    • Summers (2011)
  • Courses
    • Group Discounts
    • COI BootCamp (FREE!)
    • The Biology of Dogs >
      • Syllabus - Managing Genetics for the Future
    • Basic Population Genetics for Dog Breeders
    • Managing Genetics For the Future
    • DNA For Dog Breeders >
      • Syllabus - DNA for Dog Breeders
    • Genetics of Behavior & Performance >
      • Syllabus - Genetics Behavior & Performance
    • Genetics of Continuous Traits
    • OPEN Reg - Understanding Hip & Elbow Dysplasia >
      • Hip Quiz
    • Strategies for Preservation Breeding
    • Epigenetics
    • MORE FREE COURSES >
      • Quickie Genetics (Free!)
      • Heredity & Genetics (Free!)
      • Useful Genetics (Free!)
  • Resources
    • Genetics Databases
    • Stud Books >
      • American Kennel Club stud books
      • Field Dog stud books
      • The Kennel Club (UK)
    • Learn
    • Videos about dog genetics
    • The Amazing Things Dogs Do! (videos) >
      • Livestock Management
      • Livestock guarding
      • Transportation, exploration, racing
      • Conservation & wildlife management
      • Detection Dogs
      • Medicine & Research
      • Entertainment
      • AKC/CHF Podcasts
    • Read & Watch
    • Bookshelf
  • About Us
    • Contact
    • Carol Beuchat, PhD
    • Robert Lacy, PhD
    • Peer Berg, PhD
    • Thomas Famula, PhD
    • Heather Huson, PhD
    • Iwona Glazewska, PhD
    • Will Ludington, PhD
    • Claudia Melis, PhD
    • Jennifer Mickelberg, PhD
    • Thomas Mitchell
    • CA Sharp
    • Rory Todhunter, PhD

PLUMMER TERRIER

Data are from a pedigree database supplied by Scott Robson that still needs to be edited for errors, so this information should be considered preliminary. Missing data or ID errors usually result in UNDERESTIMATES of inbreeding and kinship, so the numbers here (which are very high) should be considered to be more optimistic than the reality. 

1688 dogs total
665 dogs with recorded offspring
36 "founder" dogs

fe = 11.4
fg = 7.6
fa = 5.9

For the current population of dogs (approx generation 31 to present, about 2010-pres):
mean MK = 27%. If the dogs in the population were as closely related as full-siblings, this number would be 25%. Essentially any mating is the equivalent (or more) of a full sibling cross. (i.e., there are no "outcrosses").


9 ancestors account for all of the diversity in the breed; only 4 account for 77% (!!!).

Rollo W/C = 29%
Pip W/C = 22%
Vampire = 14%
Jenny = 12%


A decline in population size will create a bottleneck and increase the rate of inbreeding. The number of dogs per year in the database has fallen from about 40/yr to 10 or less. 
Picture
The average level of inbreeding in the breed is 25-30%, which is what you get from a full-sib cross from unrelated parents.
Picture


A few pedigree charts -

Pendragon Molly
top is the more recent generations (to the left), below are the founding dogs (to the right) (probably too small to read, though)
Picture
Picture


These pedigree charts clearly show the small number of founder dogs (on the right), several bottleneck generations (the "waists" in the middle of the charts), and recent inbreeding (on the left).
Picture
Picture
Blog

News


About Us

Contact Us








Copyright © 2012-2017 Institute of Canine Biology
Picture
Picture