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प्रश्न
When and why does a plant breeder employ the emasculation technique?
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उत्तर
Plant breeders employed this technique to prevent pollination within the same flower or to pollinate stigmas with pollen of the desired variety. To remove the anthers, the flowers are covered with a bag before they open. This ensures that the flower is pollinated by pollen grains obtained from desirable varieties only. Later, the mature, viable, and stored pollen grains are dusted on the bagged stigma by breeders to allow artificial pollination to take place and obtain the desired plant variety.
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संबंधित प्रश्न
As a senior biology student you have been asked to demonstrate to the students of secondary level in your school, the procedure(s) that shall ensure cross-pollination in a hermaphrodite flower. List the different steps that you would suggest and provide reasons for each one of them.
List the different types of pollination depending upon the source of pollen gain.
Why does self-pollination not lead to seed formation in self-incompatible species?
Enlist advantages and disadvantages of cross pollination
Describe the structure of its microsporangium.
Compare the characteristic features of insect pollinated and wind pollinated flowers. Explain how the respective features assist in pollination.
When maturation time of reproductive parts in a flower is different.
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Mention any two contrivances in flowers which favour cross-pollination.
State four features of flowers pollinated by insects.
Differentiate between geitonogamy and xenogamy (allogamy).
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Give an account of any two biotic agents for pollination along with their adaptations.
For which of the following attractants and rewards are required?
Choose the correct statement from the following.
Wind pollination is common in ______.
Anemophily type of pollination is found in ______.
Both chasmogamous and cleistogamous flowers are present in ______.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ______.
Triple fusion in Capsella bursa pastoris is fusion of male gamete with ______.
Insect pollinated flowers are ______.
Pollination refers to the ______.
Which one of the following may require pollinators, but is genetically similar to autogamy?
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is ______
Which of the following floral adapation are adapted by hydrophilous flowers?
Mention any one example of the hydrophilous flower.
Give any four floral adaptations for chiropterophily.
Briefly discuss any two methods by which plants avoid self-pollination.
Name the pollinating agent of a flowering plant with large and coloured flowers with sticky stigma. State one characteristic feature of the pollen grains produced in such flowers.
