Affiliation: | (1) Cold Spring Harbor Laboratory, and DuPont Central Research and Development Department, Plant Science Group, Experimental Station, E402-4252 Wilmington, DE 19898, USA;(2) Present address: CNR Istituto di Mutagenesi e Differenziamento, Via Svezia 10, 56100 Pisa, Italy;(3) Present address: Integrated Genetics Inc., Boston, Mass, USA;(4) Present address: Hampshire College, Massachusetts, USA |