Artificial Hybridisation & Emasculation — NEET Biology
📚 Practice ConceptA breeder is interested in crossing different species and often genera to combine desirable characters to produce commercially 'superior' varieties. Artificial hybridisation is one of the major approaches of crop improvement programme. In such crossing experiments it is important to make sure that only the desired pollen grains are used for pollination and the stigma is protected from contamination (from unwanted pollen). This is achieved by emasculation and bagging techniques.
Match the terms related to artificial hybridisation with their correct descriptions: Column I (Term) 1. Artificial hybridisation 2. Emasculation 3. Bagging 4. Rebagging 5. Unisexual flowers Column II (Description) A. Removal of anthers from bisexual flower bud before anthesis using forceps B. Covering emasculated flower with butter paper to prevent unwanted pollen contamination C. Transfer of desired pollen onto stigma of emasculated and bagged flower D. Major approach of crop improvement to combine desirable traits by controlled pollination E. In such cases emasculation is not required; only bagging and controlled pollination is done
View solution & NCERT explanation
Correct answer: A — 1-D, 2-A, 3-B, 4-C, 5-E
Artificial hybridisation → Deliberate crossing method in crop improvement. Emasculation → Needed when female parent is bisexual; anthers removed before anthesis. Bagging → Protects stigma from foreign pollen by covering with butter paper. Rebagging → After dusting with desired pollen, flower re-covered. Unisexual flowers → Do not need emasculation, since no chance of self-pollen contamination. Only bagging + pollination required.
What does NCERT say about breeder interested crossing different?
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