Practice question

Emasculation removes immature androecium to render female parent incapable of self-pollination, ensuring only desired male parent contributes pollen in artificial cross. Techniques include manual method using forceps and scalpel to excise anthers before dehiscence at green bud stage, hot water emersion at 42 to 48C for 5 to 10 minutes to kill pollen in rice and sorghum exploiting differential thermo-sensitivity, and suction method aspirating anthers. After removal, flower covered immediately with butter-paper bag to exclude foreign pollen. Stigma bagged separately until receptive, indicated by feathery, sticky exudate secretion. Pollination performed next morning with freshly collected pollen rich in borate and calcium for tube growth. Emasculation increases hybridization success and hybrid purity essential for genetic studies and commercial seed production. This understanding supports competitive exam preparation for NEET, GATE and CSIR NET concepts linking genotype with phenotype through molecular pathways involving transcription factors, hormones and metabolic enzymes that regulate development, adaptation and reproductive biology in applied breeding programs.