Advertisements
Advertisements
प्रश्न
State what is apomixis. Comment on its significance. How can it be commercially used?
उत्तर
Apomixis is the mode of reproduction which does not involve formation of zygote through gametic fusion.
Significance of apomixis:
(i) Adventives embryos are better clones than cuttings.
(ii) Embryos formed through apomixes are generally free from infections.
Hybrid varieties provide higher and better yield. If hybrid seeds are produced ever year, they do not maintain hybrid characters because of segregation of traits. Moreover, production of hybrid seeds every year is very costly. This can be avoided by introducing apomixes in hybrid seeds.
संबंधित प्रश्न
Why are some seeds referred to as apomictic seeds?
Mention one advantage of apomictic seeds to farmers.
Fill in the blank:
The pollen grains represent the ________.
Fill in the blank:
The ______ is the base of the flower to which other floral parts are attached.
Once the pollen reaches the stigma, the pollen tube traverses down the ________ to the ovary where fertilization occurs.
Fill in the blanks:
The ______ are coloured to attract the insects that carry the pollen. Some flowers also produce ______ or ______ that attracts insects.
Which of the following is TRUE with respect to cleavage polyembryony?
The occurrence of two or more embryos in one ovule is called ______
What is polyembryony and how can it be commercially exploited?
What is pollen grain?
