Dictionary > Autopolyploidy

Autopolyploidy

Definition
noun
(genetics) A type of euploidy wherein the additional set of chromosomes is derived from a parent or identical parental species
Supplement
Euploidy is a chromosomal variation that involves the entire set of chromosomes in a cell or an organism. Euploidy is more tolerated in plants than in animals. There may be a single set (monoploidy), two sets (diploidy), or multiple sets (polyploidy, i.e. triploid, tetraploid, pentaploid, hexaploid, etc.) of chromosomes. Other types of euploidy are autopolyploidy and allopolyploidy.
In autopolyploidy, there is an additional set of chromosomes, which may be from a parent or identical parental species (i.e. a single taxon). The cell or organisms in autopolyploid condition is called an autopolyploid. Natural autopolyploids are Tolmiea menzisii (piggyback plant) and Acipenser transmontanum (white sturgeon).
In agricultural setting, autopolyploidy (particularly, autotriploidy) is applied in producing seedlessness in watermelon and bananas. An autotriploid would be one that has three copies of the basic chromosomal set. One way to produce an autotriploid is by mating a diploid with haploid (n) gamete and a tetraploid with 2n gamete. The offspring would have an unbalanced gametes and therefore possibly sterile. Thus, autotriploids are mostly propagated asexually.
Other ways of producing autopolyploids are by the union of two diploid gametes, by somatic doubling, by fertilizing an egg with two sperms, and crossing a tetraploid with a diploid.


Get more info on autopolyploidy and discover its ecological importance here: Sympatric vs allopatric speciation. Join in now!


See also:

Related form(s):

  • autopolyploid (adjective, of, relating to, or showing characteristic of, autopolyploidy; noun, a cell or an organism in autopolyploidy condition)

You will also like...

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Wart-like leaf galls on grape leaves
Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

Plant Auxins
Plant Auxins – Phototropism & Geotropism

Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

Genetics and Evolution
Genetics and Evolution

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Lake Wakatipu, New Zealand
New Zealand’s Unique Geographical History

Explore why New Zealand has such unique flora and fauna, and learn why long periods of geographical isolation. This less..

Related Articles...

No related articles found

See all Related Topics