A method of producing a transgenic hybrid plant having no or reduced sexual reproduction, the method comprising:
- (a) stably transforming a first plant with a first nucleic acid construct comprising:
- (i) a promoter, P1;
- (ii) a site specific recombinase, RS1;
- (iii) a promoter, P2;
- (iv) a selectable marker, SM1;
- (v) a promoter P3;
- (vi) at least one nucleotide sequence the expression of which results in no or reduced sexual reproduction, NRSR;
- and
- (vii) at least two target sites, TRS2, specific for a site specific recombinase, RS2 that is different from the site specific recombinase, RS1,
- and further wherein P1 is operably located upstream of RS1, P2 is operably located upstream of SM1, P3 is operably located upstream of NRSR, a first TRS2 is located immediately downstream of P1 and a second TRS2 is located upstream of NRSR;
- (b) stably transforming a second plant with a second nucleic acid construct comprising:
- (i) a promoter, P4;
- (ii) a site specific recombinase, RS2, that is different from the site specific recombinase, RS1, of (a);
- (iii) a selectable marker, SM2;
- (iv) at least one nucleotide sequence of interest, NOI;
- (v) at least two target sites, TRS1, specific for the site specific recombinase, RS1;
- and
- (vi) at least two target sites, TRS2, specific for the site specific recombinase, RS2,
- and further wherein P4 is operably located upstream of SM2, RS2 is located downstream of SM2, a first TRS1 is located immediately downstream of P4, a second TRS1 is located immediately downstream of SM2, a first TRS2 is located immediately upstream of RS2 and downstream of the second TRS1, a second TRS2 is located immediately downstream of RS2 and the NOI is located immediately downstream of the second TRS2;
- and
- (c) cross-pollinating the stably transformed first plant of (a) with the stably transformed second plant of (b) to produce a transgenic hybrid plant having no or reduced sexual reproduction.