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Genetic characterisation of a domestic dogCanis familiaris breed endemic to South African rural areas

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Abstract

Allozyme electrophoresis (horizontal starch gel and PAGE) and histochemical staining techniques were used to study the genetic composition of an endemic southern African domestic dogCanis familiaris Linnaeus, 1758, the Africanis breed. Genetic differentiation was analysed at 21 protein-coding loci. The results were compared to those for three other populations/breeds: representatives of established Western breeds, crossbred dogs of Western descent from rural areas in South Africa, and indigenous Saluki dogs from the Middle East. Nine polymorphic loci were found (Ak-1,-2, Ck, Per, Hb, Po-A-1 to-3 andPo-Tf). Two unique alleles at theCk andPo-A-2 loci separated the Africanis breed from the other groups. There were also significant differences between Africanis and the other breeds in pair-wise comparisons of allelic frequencies at polymorphic loci. An assignment test, fixation index values, gene flow and genetic distance values indicated a closer genetic association between the Africanis and Saluki breeds than with dogs of Western origin. This finding supports archaeological evidence that the endemic Africanis breed was introduced from the Middle East into Africa thousands of years ago, and not through later western influences. The average heterozygosity ranged from 0.106–0.15, with least heterozygosity in the Africanis and most in the rural crossbred group. The percentage of polymorphic loci, the mean number of alleles per locus (biologically more significant than heterozygosity), and conformation of genotypes to Hardy-Weinberg proportions showed no evidence of recent loss of genetic diversity in Africanis. Genetic differentiation and support of archaeological evidence by genetics indicate that the endemic southern African domestic dog breed is unique.

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Authors and Affiliations

  1. Department of Zoology, Rand Afrikaans University, Auckland Park, P.O. Box 524, 2006, Johannesburg, South Africa

    Letitia M. Greyling & Herman F. Van der Bank

  2. Department of Biodiversity, School of Molecular and Life Sciences, University of the North, P/Bag X1106, 0727, Sovenga, South Africa

    Paul J. Grobler

  3. Animal Improvement Institute, Agricultural Research Council, P/Bag X2, 1675, Irene, South Africa

    Antoinette Kotze

Authors
  1. Letitia M. Greyling
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  2. Paul J. Grobler
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  3. Herman F. Van der Bank
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  4. Antoinette Kotze
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Correspondence to Paul J. Grobler.

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Editors were Zdzisław Pucek and Krzysztof Schmidt.

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Greyling, L.M., Grobler, P.J., Van der Bank, H.F. et al. Genetic characterisation of a domestic dogCanis familiaris breed endemic to South African rural areas. Acta Theriol 49, 369–382 (2004). https://doi.org/10.1007/BF03192535

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  • DOI: https://doi.org/10.1007/BF03192535

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