Introduction Analysis of Genomes by Reassociation Experiments Repeated Sequences Organization of Single-copy Sequences Evolution of Repeated Sequences in Cereals Estimating the Number of Expressed Genes Chloroplast Genome Organization Mitochondrial Genome Organization RNA Editing Course Topics Course Home Page

Evolution of Repeated Sequences in Cereals The analysis of repeated sequences has also provided experimental evidence which supports the current model of cereal speciation. The following tables and the associated diagram detail the results. These show that once a repeat enters the lineage it remains. Therefore group I repeats are found in all of the species because it is the most ancient repeat. Secondly, new repeats are added to the lineage and appear in all species which subsequently diverged from the lineage. Finally, species-specific repeats are formed in each species after that species has diverged from the common lineage. The distribution of the lineage specific repeat supports the speciation model. Copyright © 1998. Phillip McClean