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प्रश्न
What is polyembryony and how can it be commercially exploited?
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उत्तर
The occurrence of more than one embryo in a seed is called polyembryony.
- Embryos developed through polyembryony are found virus-free.
- The seedlings formed from nuclear tissue in citrus are found on better clones for orchards.
- Because nucellar adventive polyembryony produces genetically homogenous parental type seedlings, it is very important in horticulture.
- Plantlets derived from these embryos are free of illness. These embryos can be separated and cultured to make clones.
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संबंधित प्रश्न
Why are some seeds referred to as apomictic seeds?
Explain the different ways apomictic seeds can develop, Give an example of each.
State what is apomixis. Write its significance. How can it be commercially used?
Fill in the blanks:
The male whorl, called the ________ produces ________.
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.
Fill in the blank:
The whorl ________is green that protects the flower until it opens.
What is adventive polyembryony?
The polyembryony commonly occurs in ______.
Adventive polyembryony in citrus is due to ______.
In case of polyembryony, if an embryo develops from the synergid and another from the nucellus which is haploid and which is diploid?
Which of the following is an example of false polyembryony?
Which plants exhibit adventive (nucellar) polyembryony?
Which embryo sac cells can develop into embryos other than the egg cell in polyembryony?
Who proposed the Recessive Gene Theory and in what year?
Who first observed polyembryony, in which plant species, and in which year?
