Experientia

, Volume 9, Issue 1, pp 7–16 | Cite as

Muttergleiche Nachkommen nach interspezifischen Kreuzungen bei Blütenpflanzen

  • Alfred Ernst
Article

Summary

A concise survey is given of the possibilities of producingmotherlike descendants: the so-called “maternal hybrids”, after interspecific pollinations in flowering plants.

On the basis of his extensive experiments in pollination and interspecific crossings with species of different sections of the genusPrimula, the author believes that he has proved that the motherlike descendants from interspecific crossings inPrimula—as in other genera likeSolanum andDigitalis—are the result neither of amphimictic combination nor of partial aposporic or pseudogamic reproduction. They are rather the result of parthenogenetic embryo formation in developing seeds, the smaller part perhaps of haplo-, the greater and more conspicuous part of diplo-parthenogenesis.

With these unexpected additions, the possibilities of the origin of motherlike descendants from interspecific crossings now include:
  1. (1)

    Mother (or Father-) like descendants fromnormal amphimictic reproduction after crossings of two species from which the one transfers the dominant, the other the recessive alternatives of the distinguishing morphological and physiological characters.

     
  2. (2)

    Motherlike descendants ofnon-amphimictic origin after interspecific pollination on and withobligate or partial aposporic and pseudogamic species.

     
  3. (3)

    Motherlike descendants ofnon-amphimictic origin from interspecific crossings of normal sexual species,from seeds with embryos from haplo- or diplo-parthenogenetic development.

     

With the description of this third category of formation of motherlike descendants, the circle of possibilities seems to be closed. One may now presume that all facts or “maternal hybrids” cited—except those from crossings with definitely proved “experimental errors”—can be explained by one of the possibilities cited above.

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Copyright information

© Birkhäuser Verlag 1953

Authors and Affiliations

  • Alfred Ernst
    • 1
  1. 1.Zürich

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