The map shown at right was taken from the GrainGenes server.
Because or the relative ease of scoring molecular markers in plant DNA from offspring in a genetic cross, maps can be constructed showing the locations of hundreds or even thousands of markers on each chromosome in a plant genome. Each tag on the map at right (eg. ABC164) represents the approximate location of a molecular marker on chromosome 1 of barley.
The use of molecular markers in plant breeding is illustrated on the next page.
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