Male gametocide

Any substance that kills the male reproductive cells (i.e., pollen, or pollen mother cells) of a plant, rendering it male-sterile. Male gametocides can be used to convert an inbreeder (e.g. wheat) into an outbreeder, for purposes of recurrent mass selection . Treated plants become the female parents, and untreated plants become the male parents.

There is also considerable interest in using male gametocides for the commercial production of seed of hybrid varieties but, so far, the available substances are not efficient enough. Male sterility

A male sterile plant is one that has fertile ovules but sterile anthers and/or pollen. Male sterility can be induced with a male gametocide, or it may be genetically controlled. Male sterility can be useful in plant breeding by forcing inbreeding plants to cross-pollinate.

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