Advertisements
Advertisements
प्रश्न
What is the importance of apomixis?
Advertisements
उत्तर
Winkler introduced the term “apomixis” in 1908. Apomixis is an aberrant type of sexual reproduction in which the egg or other cells linked with the egg (synergids, antipodals, etc.) grow into an embryo without fertilisation and with or without meiosis. Hybrid versions of many food and vegetable crops are widely grown. The cultivation of hybrids significantly enhanced production. One of the challenges with hybrids is that hybrid seeds must be created each year. If hybrid seeds are sown, the plants will segregate and lose their hybrid characteristics. Hybrid seed production is expensive, making hybrid seeds expensive for farmers. If these hybrids are transformed into apomicts, there is no character segregation in the hybrid progeny. Farmers can then continue to use hybrid seeds to grow new crops year after year, minimising the need to purchase hybrid seeds each year. Apomixis embryos are normally infection-free.
APPEARS IN
संबंधित प्रश्न
What is apomixis?
Explain various categories of apomixis.
In ______a diploid sporophyte cell produces a diploid gametophyte without undergoing meiosis.
______ refers to the formation of seeds without fertilization.
Identify the CORRECT term which describes the following condition.
In some plants, the female gamete develops into embryo without fertilization.
Adventive embryony can be observed in ______.
The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilization is called ______.
A form of asexual reproduction that mimics sexual reproduction is ______.
Are pollination and fertilization necessary in apomixis? Give reasons.
Assertion: Apomictic embryos are genetically identical to the parent plant.
Reason: Apomixis is the production of seeds without fertilization.
Apospory is the direct formation of ______.
Haploid cells belong to ______.
Give significance of apomixis.
Explain following term:
Apomixis
What is the key bypass in Apomixis?
In recurrent apomixis, the nuclei of the embryo sac are of which ploidy?
In Diplospory, a diploid embryo sac is formed directly from which structure?
What is another name for Diplospory?
In Somatic Apospory, which cell develops into a diploid \[2n\] embryo sac?
What is another name for Apospory?
Why is Adventive Embryony also called Sporophytic Budding?
Which statement expresses the role of Apomixis in crop improvement?
Non-recurrent apomixis is useful in which studies?
Scientists are trying to introduce apomixis into which crops for better food production?
What is Apogamy?
