Meaning of tetraploid in English:


Pronunciation /ˈtɛtrəplɔɪd/


  • 1(of a cell or nucleus) containing four homologous sets of chromosomes.

    ‘additional chromosomes were introduced into the tetraploid cells’
    • ‘Our studies on isogenic diploid and tetraploid cells show that tetraploids have increased chromosome instability during exponential growth.’
    • ‘Abnormal diploid, triploid and tetraploid nuclei with separated dual color signals were clearly distinguishable from normal nuclei.’
    • ‘Compared to their diploid counterparts, which have a normal set of chromosomes, tetraploid cells were more prone to generate tumors in mice, and these tumors showed genomic instability similar to many human cancers.’
    • ‘To test their model I constructed and tested triploid and tetraploid cells, which, contrary to their model that predicted that they should be more resistant, became progressively more sensitive.’
    • ‘Recent molecular data indicate differences in molecular chromosome organization among the genomes of diploid, tetraploid, and hexaploid wheat.’
    1. 1.1(of an organism or species) composed of tetraploid cells.
      ‘a tetraploid species of hybrid origin’
      • ‘In terms of economics, the polyploid AD genome is by far the most important as > 90% of the world's cotton fibre is produced by G. hirsutum and G. barbadense, two of the tetraploid species.’
      • ‘The diploid and hexaploid species are distributed in Asia and Africa, while the tetraploid species inhabit Africa and mainly the Palearctic area including Europe, North Africa, and western Asia.’
      • ‘The derivation of our model centers on tetraploid species in which multivalent pairing is only one mechanism for chromosomal pairings during meioses.’
      • ‘Species with 120 chromosomes are classified as functional diploid species, species with 250 chromosomes as functional tetraploid species, and with 500 chromosomes as functional octaploids.’
      • ‘Modern bread wheat itself is also a fairly recent crop in the evolutionary timescale, having arisen only about 4000 years ago through hybridisation of tetraploid (pasta or durum) wheat with inedible goat grass.’


  • An organism, variety, or species composed of or featuring tetraploid cells.

    ‘a tetraploid which produces flowers of double size’
    • ‘Our studies on isogenic diploid and tetraploid cells show that tetraploids have increased chromosome instability during exponential growth.’
    • ‘Then somewhere - no one knows where - the tetraploids crossed with another species of wild grass to produce the bread wheats from which we make leavened bread today.’
    • ‘The populations showed continuous morphological variation connecting the species, but karyotypically they consisted of only three types of plants: diploids, triploids, and tetraploids.’
    • ‘The results from these studies are generally consistent with theoretical expectations of higher genetic diversity in tetraploids than their diploid progenitors.’
    • ‘In addition, because the evolution of higher-level polyploids is less well understood than that of tetraploids, the study of the O. tuberosa alliance and the origins of oca provides an important case study.’