MediumBiologyHigh School (9–10)GeneralBiology in Human Welfare › Improvement in Food ResourcesConceptualBoard Exam
Name the technique in each case, and for a hybrid say which kind it is…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Name the technique in each case, and for a hybrid say which kind it is. (a) Pollen of a high-yielding wheat variety is used on a wheat variety that resists rust. (b) A gene for a protein that is poisonous to a caterpillar is taken from a bacterium and put into cotton. (c) Pollen of wheat is used on rye, a plant of another genus, to make a new crop named triticale.
Need a reminder? The key ideaShow
A variety is a kind of crop with its own traits. Breeders make better ones by hybridisation (intervarietal, interspecific or intergeneric) or by genetic modification. They aim for a higher yield, better quality, resistance to biotic and abiotic stress, a shorter time to ripen, wider adaptability and a useful plant shape. Kharif crops are sown in June and rabi crops in winter.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Both parents are wheat, but of different varieties. It is an intervarietal hybrid.
Step 2. (b) A gene from a bacterium is put into the cotton plant. It is genetic modification.
Step 3. (c) Wheat and rye belong to different genera. It is an intergeneric hybrid.
Answer: (a) intervarietal hybridisation, (b) genetic modification, (c) intergeneric hybridisation.
Discussion (0)
Log in to join the discussion.
Loading…