ISSN:
1573-5036
Schlagwort(e):
alder
;
Betulaceae
;
birch
;
in vitro clones
;
cluster
;
Frankia
;
genetic divergence
;
RFPs
;
taxonomy
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft
Notizen:
Abstract A study of restriction fragment polymorphisms of ribosomal DNA among seven actinorhizal species (Alnus spp.) and a non-actinorhizal species (Betula papyrifera Marsh.) of the Betulaceae was conducted, using a simple method for the extraction of high molecular weight restrictable nuclear DNA from leaf tissues of perennial angiosperms and nine restriction endonucleases. rDNA restriction fragments were variable within and among the species studied, and the variation noted was used to calculate the similarities and infer phenetic relationships among these members of the Betulaceae. The results confirmed the taxonomy of alder based on morphological characters, showing a clear clustering of the species ofAlnus sampled in each of the two different subgeneraAlnus andAlnobetula. Within each subgenus, the closely related taxa often classified as subspecies by their similar morphology and their ability to interhybridize, were similarly shown by restriction fragment polymorphisms to be more closely related to each other than to any other taxon. The analysis also suggested that some alder species may not be more divergent fromBetula papyrifera than from other alder species.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF02232811
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