The invention relates to pairs of parent plants for producing hybrid seeds
and to methods for producing plants with a desired phenotype. The desired
phenotype is an active enzyme, a regulatory protein or a protein which
affects the functionality and/or viability and/or structural integrity of
a cell. Preferably, the desired phenotype is substantially absent from the
parent plants/lines. In particular, the invention relates to parent plants
and methods involving plant lines for producing male-sterile plants and
seeds.
