diplontic
/dɪpˈlɒntɪk
/adjective Genetics
(Of an alga or other lower plant) having a life cycle in which the main form, except for the gametes, is diploid. Compare with haplontic and diplohaplontic.Most brown algae undergo an alternation of generations life cycle, as does Ulva, but species such as Fucus reproduce via a diplontic life cycle, meaning the adult is the sporophyte and diploid....
- The diplontic life cycle is not seen in algae or plants.
- Unfortunately, current knowledge on architecture and programming of shoot meristem was not used in this explanation to support genetic results against diplontic selection.
Derivatives
diplont
- When as in Entamoeba histolytica and Giardia lamblia no sexual cycle exists, whether they are diplonts or haplonts is obviously irrelevant.
- In most diplonts, mitosis occurs only in the diploid phase, i.e. gametes usually form quickly and fuse to produce diploid zygotes.
- Therefore, with no further diplont or haplont selection, a certain number of seeds homozygous for the mutation will be formed in the inflorescence (1: 3 ratio, theoretically), and the mutant variation may be observed in all M2-families (the progeny of the same M1-plant).
Origin
1920s: from diplo- 'double' + Greek on, ont- 'being' (from einai 'be, exist') + -ic.