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Question
One of the major approaches of crop improvement programme is Artificial Hybridisation. Explain the steps involved in making sure that only the desired pollen grain pollinate the stigma of a bisexual flower by a plant breeder.
Solution
When the desired polin greis are used for pollination and fertilisation to get desired progeny, is called artificial hybridization.
Steps of artificial hybridization:
Emasculation: In this step, the anthers (male part) are removed from a bisexual flower to avoid unwanted fertilisation from the anthers of the same flower. Unisexual flowers do not require this step.
Bagging: In this, the flowers are covered with a bag to avoid landing of unwanted pollen grains on the stigma. The bagging is done till the flower attains receptivity.
Pollination: Pollens with desired traits are dusted onto the flower after the flower is ready to receive the pollens.
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RELATED QUESTIONS
Answer the following question.
You are conducting artificial hybridization on papaya and potato. Which one of them would require the step of emasculation and why? However, for both, you will use the process of bagging. Justify giving one reason.
Emasculation and bagging are the two important steps carried during artificial hybridization to obtain superior varieties of desired plants. Explain giving reasons, in which types of flowers and at what stages are the two processes carried out.
While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant ______.
What is NOT true about the emasculation of a flower while performing an artificial cross?
Given below are the events that are observed in an artificial hybridization programme. Arrange them in the correct sequential order in which they are followed in the hybridisation programme.
(a) Re-bagging;
(b) Selection of parents;
(c) Bagging;
(d) Dusting the pollen on stigma;
(e) Emasculation;
(f) Collection of pollen from male parent.
