Affiliation: | (1) Plant Biotechnology Section, ICI Seeds, The Heath, PO Box 11, WA7 4QE Runcorn, Cheshire, England;(2) Department of Physiology and Environmental Science, University of Nottingham, School of Agriculture, Sutton Bonington, LE12 5RD Loughborough, England;(3) Present address: University of Louvain, Avenue Hippocrate 54, UCL 34.90, B-1200 Brussels, Belgium;(4) Institute of Plant Science Research, Maris Lane, CB2 2LQ Trumpington, Cambridge, England |