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Dioecy (i.e. having separate sexes) is a rather rare breeding system in flowering plants. Such rareness may result from a high probability of extinction in dioecious species because of less efficient dispersal and the costs of sexual selection, which are expected to harm dioecious species' survival on the long term. These handicaps should decrease the(More)
The plant genus Silene has become a model for evolutionary studies of sex chromosomes and sex-determining mechanisms. A recent study performed in Silene colpophylla showed that dioecy and the sex chromosomes in this species evolved independently from those in Silene latifolia, the most widely studied dioecious Silene species. The results of this study show(More)
In eukaryotic organisms, horizontal gene transfer (HGT) is regarded as an important though infrequent source of reticulate evolution. Many confirmed instances of natural HGT involving multicellular eukaryotes come from flowering plants. This review intends to provide a synthesis of present knowledge regarding HGT in higher plants, with an emphasis on(More)
The aim of this work was to characterize a nucleotide sequence MK14 that originated from a plasmid library obtained via degenerate oligonucleotide primed polymerase chain reaction (DOP-PCR) amplification of laser microdissected Y-chromosomes of Silene latifolia. This sequence showed significant similarity to parts of two adjoining genes from bacterial(More)
Horizontal gene transfer (HGT) is thought to have been involved in both prokaryotic and eukaryotic evolution. However, the extent to which it shapes eukaryotic genomes is still questionable. The ability to detect and study horizontal gene transfer events is of significant importance to our understanding of its effect on the evolution of eukaryotic genes and(More)
Few cases of spontaneously horizontally transferred bacterial genes into plant genomes have been described to date. The occurrence of horizontally transferred genes from the T-DNA of Agrobacterium rhizogenes into the plant genome has been reported in the genus Nicotiana and in the species Linaria vulgaris. Here we compare patterns of evolution in one of(More)
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