orthoselectionn.
/ˌɔːθə(ʊ)sᵻˈlɛkʃn/, U.S. /ˈˌɔrθoʊsəˈlɛkʃ(ə)n/ Biology.
Natural selection operating in one direction continuously over a relatively long period of time. Cf. orthogenesis n.
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the world > life > biology > biological processes > evolution > [noun] > selection
natural selection1842
selection1857
survival of the fittest1864
selection value1892
organic selection1896
post-selection1896
orthoselection1907
survival value1912
kin selection1964
r selection1967
1907 V. L. Kellogg Darwinism To-day x. 276 To attribute orthogenetic results to natural selection is quite right, and some one has proposed the name orthoselection to distinguish orthogenetic evolution as produced by selection from such results produced independently, or at least partly independently of selection.
1944 G. G. Simpson Tempo & Mode in Evol. v. 150 Plate supposed orthevolution to be due to two quite different causes, orthogenesis..and orthoselection, a term that is self-explanatory and has been rather widely employed, although hardly more respectable etymologically than ‘orthevolution’.
1977 D. M. Raup in A. Hallam Patterns of Evol. iii. 65 Hayami and Ozawa interpreted both examples as showing unidirectional, genetic change resulting from a single cause (orthoselection).
1986 Oxf. Surv. in Evolutionary Biol. 3 12 The concept of punctuated equilibrium was developed explicitly in contrast to phyletic gradualism equated with orthoselection.
2002 Biol. Jrnl. Linn. Soc. 75 503 Strong karyotypic orthoselection does not fully account for genome size variation in pines.
This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).
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n.1907