William C. Taylor Department of Genetics University of California
Berkeley, California 94720 It is evident by now that there is a great
deal of interest in exploiting the new technologies to genetically
engineer new forms of plants. A purpose of this meeting is to assess the
possibilities. The papers that follow are concerned with the analysis of
single genes or small gene families. We will read about genes found
within the nucleus, plastids, and bacteria which are responsible for
agri- culturally important traits. Given that these genes can be
isolated by recombinant DNA techniques, there are two possible
strategies for plant engineering. One involves isolating a gene from a
cultivated plant, changing it in a specific way and then inserting it
back into the same plant where it produces an altered gene product. An
example might be changing the amino acid composition of a seed pro- tein
so as to make the seed a more efficient food source. A second strategy
is to isolate a gene from one species and transfer it to another species
where it produces a desirable feature. An example might be the transfer
of a gene which encodes a more efficient pho- tosynthetic enzyme from a
wild relative into a cultivated species. There are three technical
hurdles which must be overcome for either strategy to work. The gene of
interest must be physically isolated.