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Theoretische Untersuchungen über die Zusammensetzung tetrasomer Populationen

II. Selbstbefruchtung

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Summary

The composition of populations of tetrasomic self-fertilizing individuals is investigated. Matrixmethods are used in the calculations. Hereby we have particularly in view the influence of the double reduction and the difference between populations of disomics and tetrasomics.

The results are:

  1. 1.

    Double reduction reduces the degree of heterozygosity (Table 2).

  2. 2.

    An interaction exists between double reduction and selection against recessive genotypes. The result of selection with regard to the maintenance of heterozygosis is reduced by double reduction. The extend of interaction depends on the intensity of selection (Fig. 2).

  3. 3.

    Compared with disomics tetrasomics have a very slow decline of heterozygosis (Table 2).

  4. 4.

    Selection against a homoallelic zygotic or gonic genotype by tetrasomic inheritance causes a very much stronger maintenance of heterogosity (Fig. 3).

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  1. Institut für Vererbungs- und Züchtungsforschung der Technischen Universität Berlin, Albrecht-Thaer-Weg 6, Berlin-Dahlem

    W. Seyffert

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Seyffert, W. Theoretische Untersuchungen über die Zusammensetzung tetrasomer Populationen. Zeitschrift für Vererbungslehre 90, 356–374 (1959). https://doi.org/10.1007/BF00888810

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  • DOI: https://doi.org/10.1007/BF00888810

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