Methods for the targeted integration of nucleotide sequences into a plant
are provided. Transfer cassettes comprising nucleotide sequences of
interest flanked by non-identical recombination sites are used to
transform a plant comprising a target site. The target site contains at
least a set of non-identical recombination sites corresponding to those
on the transfer cassette. Exchange of the nucleotide sequences flanked by
the recombination sites is effected by a recombinase.