Fuente: WIPO "tomato" This invention relates to the field of plant breeding. Particularly, the present invention relates to a diploid dicotyledonous crop plant comprising in its genome a variant of the DMP gene capable of inducing maternal haploid embryo formation and an endogenous dominant marker gene. The present invention further relates to a method for identifying and/or selecting maternal haploid dicotyledonous crop plants from a plurality of dicotyledonous crop plants comprising determining the absence of the phenotype associated with a dominant marker gene, a method for producing a maternal haploid plant comprising the step of pollinating a plant with the pollen of a diploid dicotyledonous crop plant according to the present invention, a method for producing a plant from the maternal haploid plant provided by the present invention and the use of the diploid dicotyledonous crop plant according to the present invention as a pollinator plant.