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प्रश्न
When and why does a plant breeder employ the emasculation technique?
उत्तर
Plant breeders employed this technique to prevent pollination within the same flower or to pollinate stigmas with pollens 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.
संबंधित प्रश्न
With the help of a suitable example, explain protandry.
A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds.
Answer the following questions giving reasons :
(a) What would have been the minimum number of ovules present in pre-pollinated pistil ?
(b) How many microscope mother cells would minimally be required to produce requisite number of pollen grains ?
(c) How many pollen grains must have minimally pollinated the carple ?
(d) How many male gametes would have used to produce these 200 viable seeds ?
(e) How many megaspore mother cells were required in this process ?
Mention two strategies evolved to prevent self-pollination in flowers.
Name of the part of the ovary which gives rise to:
Fruit ______
Give four adaptations shown by flowers pollinated by wind.
Differentiate Between Cross Pollination and Self Pollination:
Choose the correct statement from the following.
Pollination occurs in ______.
Chief pollinators of agricultural crops are ______.
Autogamy can occur in a chasmogamous flower if ______.
