ANBI 360.3 Lecture Notes - Lecture 3: Chow Chow, Melanocortin 1 Receptor, Felinae
20 Jun 2018
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LECTURE 3!
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Breed!
A populationmg distinguishable from another of the same species by frequencies of genes, •
chromosomaal varation or hereditary phenotypic characteristics!
A breed is subject to certain criteria by law- breed standard " registration"!•
Not in the united states!◦
In canada !◦
Definition of the phenotypic characteristics of a breed!◦
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Breed orgins!
Based on dna study by using 96 microsatellites on 414 dogs of 85 breeds:!•
Asian spitze were most distinct from other dogs ( chow chow)!•
Most similar to wolves!◦
Therefor the oldest!◦
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Breed differences!
Varation among breeds was 27% of total varation = considerable overlap!•
75 SNPs ( single neucleaotide polymorphism)!•
14 breed specific!•
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Breed evolution!
Tree based on neighbour joining method!•
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Ancient sighthounds!
A mutationg in the MC1R gene is unique to salukis and afghan hounds!•
It causes a phenotype called grizzle or domino!•
Because it is present in both, its must have occured before they were seperate breeds !•
Common to both breeds, has to be really old!•
Example on something they used to date them!•
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Breed evolution handout!
Five major classes!•
Hunting studied further and now terriers and others are seperated!•
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Breed orginins!
Mid 19th century!•
Breed clubs and standards!•
Many European breeds diverged quickly during this time!•
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Dog breeds!
Around 400 breeds world wide!•
152 recognized by the AKC!•
173 with CKC + 31 misc.!•
Standards change for breeds for different countries!•
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Purebred or crossbred!
The pound special is the most popular type of dog currently!•
Many dog magazines focus on these!•
PETA campaign in california !•
