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Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression is a long-term process, even when artificial; it may take many hybrid generations before ...
Introgressive hybridization, also known as introgression, is the flow of genetic material between divergent lineages via repeated backcrossing. In plants, this backcrossing occurs when an F 1 {\displaystyle F_{1}} generation hybrid breeds with one or both of its parental species.
Hybridization Confirmed or putative hybridization? Putative parental/ introgressive species Polyploid or homoploid? Polyploid chromosome count References Notes Abelmoschus esculentus: Okra: Malvaceae: Allopolyploid origin: Putative: Uncertain: Polyploid (tetraploid) usually 2n=4x=130: Joshi and Hardas, 1956; Schafleitner et al., 2013: Variable ...
Introgression is gene transfer among taxa and is a result of hybridization, followed by repeated backcrossing with parental individuals. Introgressive hybridization occurs often in plants, and results in increased genetic variation, which can facilitate rapid response to climate change. [3]
For example, when trait combinations lead to reduced fitness in the hybrid offspring in specific environments. Genome stabilization - the process by which different ancestry blocks or introgression tracts become fixed within a hybrid species when hybridization between the hybrid taxon and its parent taxa has ceased.
Genetic analysis has revealed multiple instances of introgressive hybridization between bear species, [4] [5] [6] including introgression of polar bear DNA into brown bears during the Pleistocene ("grizzly bear" is a local common name for Ursus arctos whereas "brown bear" is used internationally and in science to refer to the species as a whole ...
A concrete example of this is found in the introgressive hybridization of the Owens Tui Chub (Siphateles bicolor snyderi) and the Lahontan Tui Chub (Siphateles bicolor obesa); breeding and the creation of hybrids with the Lahontan Tui Chub has led to the Owens Tui Chub being categorized as endangered. In these populations, there are ...
Edgar Shannon Anderson (November 9, 1897 – June 18, 1969) was an American botanist. [1] [2] He introduced the term introgressive hybridization [3] and his 1949 book of that title was an original and important contribution to botanical genetics. [4]