Demography and H-Lea salivary secretion of the Macá Indians of Paraguay

Authors

  • F. M. Salzano,

    1. Departamento de Genética, Universidade Federal do Rio Grande do Sul, Pôrto Alegre, Brazil
    2. Instituto de Ciencias and Facultad de Ciencias Médicas, Universidad Nacional, Asunción, Paraguay
    3. Departamento de Ciencias Biológicas, Universidad Nacional, La Plata, Argentina
    4. Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
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  • R. Moreno,

    1. Departamento de Genética, Universidade Federal do Rio Grande do Sul, Pôrto Alegre, Brazil
    2. Instituto de Ciencias and Facultad de Ciencias Médicas, Universidad Nacional, Asunción, Paraguay
    3. Departamento de Ciencias Biológicas, Universidad Nacional, La Plata, Argentina
    4. Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
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  • M. Palatnik,

    1. Departamento de Genética, Universidade Federal do Rio Grande do Sul, Pôrto Alegre, Brazil
    2. Instituto de Ciencias and Facultad de Ciencias Médicas, Universidad Nacional, Asunción, Paraguay
    3. Departamento de Ciencias Biológicas, Universidad Nacional, La Plata, Argentina
    4. Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
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    • Research career member of Argentina's Consejo Nacional de Investigaciones Cientificas y Técnicas.

  • H. Gershowitz

    1. Departamento de Genética, Universidade Federal do Rio Grande do Sul, Pôrto Alegre, Brazil
    2. Instituto de Ciencias and Facultad de Ciencias Médicas, Universidad Nacional, Asunción, Paraguay
    3. Departamento de Ciencias Biológicas, Universidad Nacional, La Plata, Argentina
    4. Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
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Abstract

The Macá Indians living at Fray Bartolomé de las Casas show a high rate of endogamy, high mortality (36% of them die before the age of reproduction), low fertility (average of 3.6 livebirths per female who completed her reproductive performance) and low variance in family size. The index of opportunity for selection (0.88) is lower than the one obtained in other populations of agriculturalists and in industrialized communities. The frequency of H secretors (N = 143) is 97% and that of Lea secretors (N = 123) is 78%.

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