panmixian.

Brit.

/panˈmɪksɪə/, U.S.

/ˌpænˈmɪksiə/

Origin: A borrowing from Greek, combined with English elements; modelled on a German lexical item. Etymons: pan- comb. form, Greek μίξις , -ia suffix¹.

Etymology: < pan- comb. form + ancient Greek μίξις mixing, mingling (see mixis n.) + -ia suffix¹, after German Panmixie (1883 in the passage translated in quot. 1889 at sense 1).

Biology.

1. The free combination, alteration, and dilution of heritable characteristics supposed (in the theory of Weismann) to occur in the absence of natural selection, originally proposed as an explanation of the degeneration of disused organs or structures, and of the variability of domesticated animals; the theory which proposes this. Now historical.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding

intergeneration1888

panmixia1889

panmixy1890

syngamy1904

1889 E. B. Poulton et al. tr. A. Weismann Ess. Heredity 90 This suspension of the preserving influence of natural selection may be termed Panmixia, for all individuals can reproduce themselves and thus stamp their characters upon the species, and not only those which are in all respects, or in respect to some single organ, the fittest.

1895 Harper's Mag. Mar. 634/1 A fortuitous mixture of ancestral tendencies..called panmixia.

1903 Science 27 Nov. 465/2 The silkworm..may well be looked on as having lost its earlier sensitiveness to light through panmixia—if there be panmixia.

2002 S. J. Gould Struct. Evolutionary Theory iii. 205 Weismann first attempted to resolve the difficulties posed by degeneration with his hypothesis of panmixia.

2. Unrestricted interbreeding within a population; (Genetics) a mating system in which any male has an equal probability of mating with any female, either generally, or with respect to a particular heritable characteristic (cf. assortative adj.); random mating.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding > group

panmixia1896

panmixis1968

panmixia1992

1896 Internat. Jrnl. Ethics 6 393 The organization of classes continues the work of natural selection among men, for it militates against the chance of panmixia,—that is, the sexual blending of men of contrasted types of endowment.

1909 W. M. Urban Valuation xi. 341 Social pan-mixia, the breaking down of class barriers, makes impossible that fixity and contrast of ideals.

1911 Amer. Naturalist 45 238 Populations of cross-breeding plants are composed of fundamentally distinct types, intermingled but not changed by panmixia.

1955 New Biol. 18 35 Panmixia or random mating..does not mean promiscuity.

1988 Biol. Jrnl. Linn. Soc. 35 76 Estimates of gene flow..using more alleles showed high levels of gene flow, indicating..universal panmixia among conifers.

2001 Nature 22 Feb. 1037/2 The panmixia hypothesis—that all European eel (Anguilla anguilla) migrate to the Sargasso Sea for reproduction and comprise a single, randomly mating population—is widely accepted.

3. A population within which unrestricted interbreeding takes place; a panmictic population. rare.

ΘΚΠ

the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding > group

panmixia1896

panmixis1968

panmixia1992

1992 K. S. Robinson Red Mars (1993) ii. 64 ‘Janet thinks we're a panmixia.’ Maya would ignore him..but later she looked up the word..and found that a panmixia was a group where every male mated with every female.

This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022).

单词	panmixia
释义	panmixian. Brit. /panˈmɪksɪə/, U.S. /ˌpænˈmɪksiə/ Origin: A borrowing from Greek, combined with English elements; modelled on a German lexical item. Etymons: pan- comb. form, Greek μίξις , -ia suffix¹. Etymology: < pan- comb. form + ancient Greek μίξις mixing, mingling (see mixis n.) + -ia suffix¹, after German Panmixie (1883 in the passage translated in quot. 1889 at sense 1). Biology. 1. The free combination, alteration, and dilution of heritable characteristics supposed (in the theory of Weismann) to occur in the absence of natural selection, originally proposed as an explanation of the degeneration of disused organs or structures, and of the variability of domesticated animals; the theory which proposes this. Now historical. ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding intergeneration1888 panmixia1889 panmixy1890 syngamy1904 1889 E. B. Poulton et al. tr. A. Weismann Ess. Heredity 90 This suspension of the preserving influence of natural selection may be termed Panmixia, for all individuals can reproduce themselves and thus stamp their characters upon the species, and not only those which are in all respects, or in respect to some single organ, the fittest. 1895 Harper's Mag. Mar. 634/1 A fortuitous mixture of ancestral tendencies..called panmixia. 1903 Science 27 Nov. 465/2 The silkworm..may well be looked on as having lost its earlier sensitiveness to light through panmixia—if there be panmixia. 2002 S. J. Gould Struct. Evolutionary Theory iii. 205 Weismann first attempted to resolve the difficulties posed by degeneration with his hypothesis of panmixia. 2. Unrestricted interbreeding within a population; (Genetics) a mating system in which any male has an equal probability of mating with any female, either generally, or with respect to a particular heritable characteristic (cf. assortative adj.); random mating. ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding > group panmixia1896 panmixis1968 panmixia1992 1896 Internat. Jrnl. Ethics 6 393 The organization of classes continues the work of natural selection among men, for it militates against the chance of panmixia,—that is, the sexual blending of men of contrasted types of endowment. 1909 W. M. Urban Valuation xi. 341 Social pan-mixia, the breaking down of class barriers, makes impossible that fixity and contrast of ideals. 1911 Amer. Naturalist 45 238 Populations of cross-breeding plants are composed of fundamentally distinct types, intermingled but not changed by panmixia. 1955 New Biol. 18 35 Panmixia or random mating..does not mean promiscuity. 1988 Biol. Jrnl. Linn. Soc. 35 76 Estimates of gene flow..using more alleles showed high levels of gene flow, indicating..universal panmixia among conifers. 2001 Nature 22 Feb. 1037/2 The panmixia hypothesis—that all European eel (Anguilla anguilla) migrate to the Sargasso Sea for reproduction and comprise a single, randomly mating population—is widely accepted. 3. A population within which unrestricted interbreeding takes place; a panmictic population. rare. ΘΚΠ the world > life > biology > biological processes > genetic activity > heredity or hereditary descent > [noun] > interbreeding > group panmixia1896 panmixis1968 panmixia1992 1992 K. S. Robinson Red Mars (1993) ii. 64 ‘Janet thinks we're a panmixia.’ Maya would ignore him..but later she looked up the word..and found that a panmixia was a group where every male mated with every female. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < n.1889
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