"December 2002" / Corrections on back page. / Bibliography: leaves 118-129. / 129 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Annual ryegrass toxicity (ARGT) occurs in grazing animals following the ingestion of seedheads of the annual ryegrass Lolium rigidum, infested with the corynetoxin-producing bacteria, Rathayibacter toxicus. Breaking the disease cycle, through the use of lines of L. rigidum resistant to the nematode Anguina funesta can be used to reduce th risk of ARGT outbreaks. In L. rigidum, resistance to A. funesta appears to be under the control of two unknown, but complementary genes. This study explored alternate approaches towards the allocation of genotype for lines of L. rigidum with respect to resistance to A. funesta. / Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2003

Thesis (M.Ag.Sc.) -- Dept. of Agronomy, Waite Agricultural Research Institute, University of Adelaide, 1978).

"July 2001" / Includes bibliographical references (leaves 144-183) / xv, 193 leaves : ill., plates (col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Applied and Molecular Ecology, 2002