Gametocide

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A gametocide is a substance that is injected during the development of the ear embryo and prevents the formation of the male flower parts ( anthers , pollen ). A variety treated in this way becomes a male sterile maternal line that can no longer fertilize itself, but needs a cross-pollinator. This makes it possible to cross two self-fertilizing lines (varieties) with each other (which creates a heterosis effect).

As with wheat ( e.g. Hybnos1 , Hybred ), attempts are being made to produce hybrid varieties in the grain triticale . Currently, only chemical castration with gametocides (which is not approved in Germany) is possible.