Bibliography: leaves 70-85. / 85, [29] leaves, [20] leaves of plates : ill. (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The aim of this study was to develop the midget chromosome as a model system to isolate structural elements from a cereal chromomsome. The midget is a diminutive chromosome found in wheat plants that contain a substituted rye cytoplasm. / Thesis (Ph.D.)--University of Adelaide, Dept. of Plant Science, 1995