Emasculation is a process performed in bisexual flowers to obtain a desired variety of a plant by crossing a particular plant with the desired pollen grain. It involves the removal of anthers from the flower bud before dehiscence, which is the process of anthers opening to release pollen. The process is performed by plant breeders to prevent self-pollination and to ensure that the flower is pollinated by pollen grains obtained from desirable varieties only. Emasculation is essential in bisexual flowers to prevent self-pollination, while in monoecious plants, male flowers are removed. The process of emasculation is employed in various plant hybridization techniques.

In summary, emasculation is a process of removing anthers from the flower bud before dehiscence, which is performed in bisexual flowers to obtain a desired variety of a plant by crossing a particular plant with the desired pollen grain. It is employed in various plant hybridization techniques to prevent self-pollination and ensure that the flower is pollinated by pollen grains obtained from desirable varieties only.