In Citrus and Opuntia, the agamospermy is due to
(A) Diploid egg cell
(B) Diploid sporophytic cell
(C) Haploid egg cell
(D) Haploid female gamete
In Citrus and Opuntia, the agamospermy is due to
(A) Diploid egg cell
(B) Diploid sporophytic cell
(C) Haploid egg cell
(D) Haploid female gamete
Agamospermy is the asexual production of seeds and embryos without fertilization or meiosis. The term originated from Greek and its etymology stands for “away from” + “mixing”.
Offspring produced through agamospermy are generally identical to the parent plant.
There are three types of agamospermy: adventive embryony (adventive polyembryony), recurrent agamospermy (recurrent apomixis; apospory and diplospory), and non-recurrent agamospermy.
Adventive embryony (adventive polyembryony)
This is when an embryo is developed directly from the ssporophytic cells like integuments of the ovule or the diploid cell of nucellus, and not from a fertilized egg. In such a case, the embryo formed either degenerates or competes with the adventive embryos.
Citrus and opuntia are the best examples for adventive embryony.
So option B is the correct answer
Agamospermy is the asexual production of seeds and embryos without fertilization or meiosis. The term originated from Greek and its etymology stands for “away from” + “mixing”.
Offspring produced through agamospermy are generally identical to the parent plant.
There are three types of agamospermy: adventive embryony (adventive polyembryony), recurrent agamospermy (recurrent apomixis; apospory and diplospory), and non-recurrent agamospermy.
Adventive embryony (adventive polyembryony)
This is when an embryo is developed directly from the ssporophytic cells like integuments of the ovule or the diploid cell of nucellus, and not from a fertilized egg. In such a case, the embryo formed either degenerates or competes with the adventive embryos.
Citrus and opuntia are the best examples for adventive embryony.
So option B is the correct answer
