1. Dep. of Primary Industries, Biosciences Research Division; Victorian AgriBiosciences Centre, La Trobe Research and Development Park; Bundoora Victoria 3083 Australia
2. National Centre for Advanced Bio-Protection Technologies, PO Box 84; Lincoln Univ.; Lincoln 7647 Canterbury New Zealand
3. This project was funded by the Victorian Department of Primary Industries and Molecular Plant Breeding Cooperative Research Centre
4. Dep. of Primary Industries, Biosciences Research Division; Hamilton Centre; Hamilton Victoria 3300 Australia
5. PGG Wrightson Seeds; P.O. Box 175 Lincoln 7640 Canterbury New Zealand