There are two major divisions of polyploidy, allopolyplody and autopolyploidy.
2.
This phenomenon usually happens when autopolyploidy occurs in diploid plants.
3.
The tetraploid subspecies is believed to have arisen from the diploid subspecies by autopolyploidy.
4.
This, along with errors in meiosis that lead to aneuploidy, can create an environment where autopolyploidy is very likely.
5.
Autopolyploidy results from the sudden multiplication in the number of chromosomes in typical normal populations caused by unsuccessful separation of the chromosomes during meiosis.
6.
Such an event could either double the genome of a single species ( autopolyploidy ) or combine those of two species ( allopolyploidy ).
7.
"Hyacinthoides cedretorum " is the only tetraploid species in the genus; it is unclear whether it originated by autopolyploidy or allopolyploidy.
8.
One common source of autopolyploidy in plants stems from " perfect flowers ", which are capable of self-pollination, or " selfing ".
9.
Autopolyploidy, however, is generally considered to be a neutral process, thought it has been hypothesized that autopolyploidy may serve as a useful maechanism for inducing speciation, and therefore assisting in the ability of an organism to quickly colonize in new habitats without undergoing the time-intensive and costly period of genomic reorganization experienced by allopolyploid species.
10.
Autopolyploidy, however, is generally considered to be a neutral process, thought it has been hypothesized that autopolyploidy may serve as a useful maechanism for inducing speciation, and therefore assisting in the ability of an organism to quickly colonize in new habitats without undergoing the time-intensive and costly period of genomic reorganization experienced by allopolyploid species.
मोबाइल