introgressionn.
/ɪntrə(ʊ)ˈɡrɛʃən/, U.S. /ˌɪntrəˈɡrɛʃən/, /ˌɪntroʊˈɡrɛʃən/ 1. A going or coming in, entrance, incoming.
ΘΚΠ
the world > movement > motion in a certain direction > going or coming in > [noun]
ingangc900
infarea1175
entrya1325
enteringc1330
ingoing1340
incominga1382
coming ina1398
ingressionc1470
introit1481
ingate1496
entrance1528
ingredience1538
ingress1543
impassing1545
enterc1547
entral1642
entrada1648
entrata1656
introgression1656
entrée1692
adit1836
immergence1859
1656 T. Blount Glossographia Introgression (introgressus), a going in.
1844 J. H. Stocqueler Hand-bk. India 262 Instead of being jostled out of employment by the introgression of Europeans.
2. Biology. The transfer of a small amount of genetic material from one (usually plant) species to another as a result of hybridization between them and repeated back-crossing.
ΘΚΠ
the world > life > biology > biological processes > genetic activity > [noun] > changes or actions of genes or chromosomes > transfer
translocation1921
transposition1924
introgression1938
introgressive hybridization1938
sexduction1960
transgenosis1973
1938 Anderson & Hubricht in Amer. Jrnl. Bot. XXV. 399 We conclude that there is a strong introgression of T. canaliculata into T. occidentalis.
1950 G. L. Stebbins Variation & Evol. in Plants vii. 265 In this instance, therefore, frequent interspecific hybridization is not accompanied by introgression of genes across the barrier formed by partial sterility of the F1 hybrid.
1963 K. R. Lewis & B. John Chromosome Marker iv. iv. 373 Low sterility and open pollination will favour introgression.
1971 V. Grant Plant Speciation iv. 52 If the introgression goes far enough, it may obliterate the morphological and ecological distinctions between the original species.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022).
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