Cytotaxonomische Untersuchungen in der Artengruppe desRanunculus alpestris (Ranunculaceae) |
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Authors: | Moritz Müller Matthias Baltisberger |
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Institution: | (1) Geobotanisches Institut, Eidgenössischen Technischen Hochschule Zürich, Universitätsstrasse 2, CH-8092 Zürich, Schweiz;(2) Eidgenössische Forschungsanstalt für landwirtschaftlichen Pflanzenbau, Reckenholzstrasse 191/211, CH-8046 Zürich, Schweiz |
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Abstract: | Morphological and cytological investigations as well as crossing experiments were carried out with the 5 species of theRanunculus alpestris group (R. alpestris L.,R. traunfellneri
Hoppe,R. bilobus
Bertol.,R. crenatus
Waldst. etKit.,R. magellensis
Ten.). A key to the species is presented; localities and distribution are given in addition to extensive diagnoses. Crossing experiments between the 5 taxa were successful (F1-F3 individuals, backcross types, tripeland quadrupelbastards); the morphology of the experimentally obtained F1-hybrids was mostly intermediate. All 5 species as well as all hybrids have a chromosome number of 2n = 16; there is no statistically significant difference between the karyotypes of the 5 taxa. According to the results of the morphological investigations and the crossing experiments we can distinguish 2 subunits of very closely related species: a)R. alpestris, R. traunfellneri, R. bilobus; b)R. crenatus, R. magellensis. The speciation within the group ofRanunculus alpestris is discussed. |
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Keywords: | Ranunculaceae Ranunculus alpestris R traunfellneri R bilobus R crenatus R magellensis Morphology localities distribution crossing experiments chromosome numbers karyotypes speciation Flora of Europe |
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