| 释义 |
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.
1925C. 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. 1931Genetics XVI. 462 The octoploid may be considered as having a replication of eight basically similar genoms. 1943Hereditas XXIX. 193 (heading) Notes on octaploid Solanum punæ plant. 1961Lancet 26 Aug. 488/1 The finding of 8 sex-chromatin bodies in an octaploid XXXY cell can be predicted from the above formula. 1973Nature 11 May 87/2 Triploids.., artificial tetraploids and octoploids were all found to synthesize orientin isomers. 1974Sci. 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.
1934Gen. Program 3rd Pittsburgh Meeting Amer. Assoc. Adv. Sci. 34 Octoploidy and diploidy in Miastor americana. 1948Jrnl. 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. 1970Ambrose & Easty Cell Biol. 496 (Index), Octoploidy. |