Co-Authors:
Salts, Y., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Herrmann, R.G., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel, Botanisches Institut der Universität Düsseldorf, Düsseldorf 1, D-4000, Germany
Peleg, N., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Lavi, U., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Izhar, S., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Frankel, R., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Beckmann, J.S., Division of Plant Genetics and Breeding, ARO, The Volcani Center, Bet Dagan, 50-250, Israel
Abstract:
Plastid DNA of seven American and four Australian species of the genus Nicotiana was examined by restriction endonuclease analysis using the enzymes Sal I, Bgl I, Pst I, Kpn I, Xho I, Pvu II and Eco RI. These endonucleases collectively distinguish more than 120 sites on N. tabacum plastid DNA. The DNAs of all ten species exhibited restriction patterns distinguishable from those of N. tabacum for at least one of the enzymes used. All distinctive sites were physically mapped taking advantage of the restriction cleavage site map available for plastid DNA from Nicotiana tabacum (Seyer et al. 1981). This map was extended for the restriction endonucleases Pst I and Kpn I. In spite of variation in detail, the overall fragment order was found to be the same for plastid DNA from the eleven Nicotiana species. Most of the DNA changes resulted from small insertions/deletions and, possibly, inversions. They are located within seven regions scattered along the plastid chromosome. The divergence pattern of the Nicotiana plastid chromosomes was strikingly similar to that found in the genus Oenothera subsection Euoenothera (Gordon et al. 1982). The possible role of replication as a factor in the evolution of divergence patterns is discussed. The restriction patterns of plastid DNA from species within a continent resembled each other with one exception in each instance. The American species N. repanda showed patterns similar to those of most Australian species, and those of the Australian species N. debneyi resembled those of most American species. © 1984 Springer-Verlag.
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