octoploid, a. (n.) Biol.
(ˈɒktəplɔɪd)
Also octa-.
[f. octo- + -ploid.]
(Made up of somatic cells) containing eight sets of chromosomes. Also as n., an octoploid organism.
| 1925 C. C. Hurst Experiments in Genetics xxxviii. 542 By successive losses of septets the decaploid species would give rise to an octoploid species, the octoploid to a hexaploid species, the hexaploid to a tetraploid species. 1931 Genetics XVI. 462 The octoploid may be considered as having a replication of eight basically similar genoms. 1943 Hereditas XXIX. 193 (heading) Notes on octaploid Solanum punæ plant. 1961 Lancet 26 Aug. 488/1 The finding of 8 sex-chromatin bodies in an octaploid XXXY cell can be predicted from the above formula. 1973 Nature 11 May 87/2 Triploids.., artificial tetraploids and octoploids were all found to synthesize orientin isomers. 1974 Sci. Amer. Aug. 73/2 If a hexaploid wheat (T. aestivum) is crossed with rye, the result is an octoploid triticale. |
Hence ˈoctoploidy, the state or condition of being octoploid.
| 1934 Gen. Program 3rd Pittsburgh Meeting Amer. Assoc. Adv. Sci. 34 Octoploidy and diploidy in Miastor americana. 1948 Jrnl. Heredity XXXIX. 42/1 Instead of abrupt doublings of the chromosome number as in mitosis, there is therefore a gradual change from diploidy to tetraploidy, from tetraploidy to octoploidy and so on. 1970 Ambrose & Easty Cell Biol. 496 (Index), Octoploidy. |