Article
Two-dimensional RFLP analyses reveal megabase-sized clusters of rRNA gene variants in Arabidopsis thaliana, suggesting local spreading of variants as the mode for gene homogenization during concerted evolution.
The Plant journal : for cell and molecular biology - 1 Feb 1996
Copenhaver G P, Pikaard C S
Abstract excerpt
Eukaryotic genes encoding the precursor of 18S, 5.8S and 25S ribosomal RNA (rRNA genes or rDNA) are virtually identical within a species, yet they evolve rapidly between species, a phenomenon known as concerted evolution. The mechanisms by which sequence homogenization and fixation of new rRNA gene variants occurs within a genome are not clear. In diploid Arabidopsis thaliana, approximately 1500 rRNA genes are...
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