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Cloned and mapped awn loci on barley chromosomes. Chromosomes 1H, 5H, and 6H do not contain known loci for awns and are not shown. Illustrated on the right sides of chromosomes are four cloned genes (shown in blue, vrs1/lr, uzu1, Kap1 and lks2/ubs4) that regulate awn development and 10 mapped awnness loci (shown in green) that are described in this review. Morphological markers near the awnness loci are indicated in black and listed on the left side of chromosomes.
