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The Journal of Heredity 1992:83(5):367-374
© 1992 The American Genetic Association 83:367-374

research-article

Comparative F Statistics Analysis of the Genetic Structure of Ten Spanish Dog Breeds

J. Jordana, J. Piedrafita, A. Sanchez, and P. Puig

Unitat de Genetica i Millora Animal, Departament de Patologia i de Produccio Animals, Facultat de Veterinaria
The Departament de Matematiques, Universitat Autdnoma de Barcelona 08193 Bellaterra, Barcelona, Spain

Abstract

The genetic structure and relationships among 10 Spanish dog breeds have been studied by using F statistics. Data came from 21 structural genic loci that codify for blood-soluble proteins and enzymes detected by electrophoresis. Of the 21 loci, 11 were found to be polymorphic. The study was done at three levels of hierarchical differentiation: ancestral trunks, breeds, and subpopulations. The deficit of heterozygotes was estimated at the subpopulation, breed, and ancestral trunk levels, with values of 4.0%, 6.5%, and 11.2%, respectively. In the whole population, the deficit of heterozygotes was about 17%. The proportion of genetic variability attributable to differences between subpopulations, breeds, and ancestral trunks was estimated to be 14.2%, 9.9%, and 6.9%, respectively. The dendrogram, obtained by using values of genic differentiation (FST) as a measure of the genetic distance among populations, is topologically identical to the one obtained using Nei's index of distance, which indicates a high correlation (r = .99) between both distances. These racial groupings, however, differ from the grouping obtained from historical, archeological, and morphological data.


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