PMID: 8582363Sep 1, 1995Paper

Application of DNA fingerprinting to the taxonomy of European blackberry species

Electrophoresis
H Nybom, T Kraft

Abstract

Thousands of blackberry species (Rubus subgenus Rubus) have been described from Central and Northern Europe. These species are usually polyploid and pseudogamous. Since apomixis is only facultative, the species have retained the possibility to produce some offspring by sexual recombination. Hybridization of restriction-enzyme-digested DNA samples to the M13, (AC)/(TG) and 33.15 probes has yield valuable information on the occurrence and distribution of genetic variation in Rubus. Intraspecific variation proved to be very restricted, with identical DNA fingerprints sometimes being exhibited by Swedish, Danish and German populations of the same species. By comparison, interspecific variation was usually pronounced, suggesting that most species have been derived through genetic recombination. Speciation through interspecific hybridization was demonstrated in one case. Several critical taxa were investigated; some of these proved to have unique DNA fingerprints, whereas others appear to be identical with previously described species. Evaluation of raspberry cultivars, obtained through several generations of vegetative propagation or with various in vitro techniques, failed to detect any DNA fingerprint variation, suggesting that th...Continue Reading

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