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प्रश्न
State what is apomixis. Write its significance. How can it be commercially used?
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उत्तर
Apomixis is a form of asexual reproduction in which an embryo is formed without meiosis and fusion of haploid gametes. It can take place through diploid sporophytic cells of the ovule or from an unfertilized egg (parthenogenesis) itself.
Significance:
Certain species of plants belonging to Asteraceae, and grasses exclusively use the phenomenon of apomixis for producing seeds.
Commercial applications of apomixis:
1. By apomixis, hybrid varieties of seeds can be produced, which will provide higher and better yield.
2. Apomixis prevents the loss of specific characteristics in the hybrid plants.
3. Apomixis is a cost-effective method of producing seeds.
APPEARS IN
संबंधित प्रश्न
Mention one advantage of apomictic seeds to farmers.
Fill in the blanks:
The male whorl, called the ________ produces ________.
Fill in the blank:
The ________contains the egg or ovum.
The occurrence of two or more embryos in one ovule is called ______
Adventive polyembryony in citrus is due to ______.
The plant part which consists of two generations, one within the other-
- Pollen grains inside the anther.
- Germinated pollen grain with two male gametes.
- Seed inside the fruit.
- Embryo sac inside the ovule
Choose the correct option.
Explain following term:
Polyembryony
Who proposed the Necrohormone (Neochromosome) Theory and in what year?
Based on the discovery information provided, in which year was polyembryony first observed in Citrus?
Which mechanism involves the splitting or division of the zygote or proembryo into multiple parts?
