Available for library use only and copying in accordance with the Copyright Act 1968, as amended. Thesis (PhD)--University of Tasmania, 2007. Includes bibliographical references. Ch. 1. General introduction -- Ch. 2. Development of a high-throughput system for screening Al tolerance in barley -- Ch. 3. Validation of an Alt locus for Al tolerance scored with ECR staining method in barley cultivar Honen -- Ch. 4. A high-density genetic map of the Al tolerance locus in barley -- Ch. 5. Development of STS markers from barley BAC clones and identification of a putative nucleotide sugar transporter gene in barley -- Ch. 6. High-resolution mapping of an Al tolerance gene Alp using rice/barley synteny -- Ch. 7. Further research recommendations