Separation of a pronucleus by premature cytokinesis: a mechanism for immediate diploidization
of tripronuclear oocytes?
Whereas, 0.33, 0.165, 0.0825 ppm treatment showed survival rate of 26.66, 33.33 and 11.11%, respectively but plants showed 100% sterility with sectoral diploidization
. Conclusively, local derivative inducer lines viz.
Due to spontaneous diploidization
, haESCs has to be sorted every few passages to select for haploid cells.
Egg Activation and Diploidization
. Eggs were divided into three batches: two batches contained about 900 eggs in each and one batch contained about 300 eggs.
In practice however, WGDs are often followed by loss of some or all of the duplicated genes, or even chromosomes, in a process referred to as diploidization
(see Wolfe, 2001).
Luo, "Duplication and DNA segmental loss in the rice genome: implications for diploidization
," New Phytologist, vol.
Studies of retention of selected duplicate genes following diploidization
of ancient polyploidization events have found that many duplicate genes have been preferentially maintained in a dosage-sensitive relationship .
The origin of such high chromosome number was a matter of debate and two hypotheses were proposed, as it was said before: one suggesting that homosporous ferns are true polyploids, resulting from repeated cycles of polyploidy, followed by a process of diploidization
with a massive gene silencing; while the other, suggested that they are true diploids having achieved high chromosome numbers via other mechanisms (Barrington et al.
The viable resultant gynogens from hybridization may be the result of male chromosome elimination and spontaneous diploidization
of the maternal chromosome set (SDM) (Ye et al.
Allopolyploid evolution coupled with diploidization
may also facilitate the formation of new species capable of utilizing unique niches via plasticity and subsequent niche specialization.
On the diploidization
mechanism of the genus Aegilops: Meiotic behaviour of interspecific hybrids.
In a number of polyploid plants the presence of more or less similar mechanisms of"diploidization
" has been suggested: e.g., Avena (Ladizinsky, 1973; Jauhar, 1977), Festuca L.