incipient species


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incipient species

a population of a species which is approaching the point of genetic isolation from other populations of the same species, though presently capable of interbreeding with them.
References in periodicals archive ?
An incipient species is an isolated group of animals presumed to be in the early stages of evolving into a new species.
But the effect on congruence of gene trees and species trees would depend on how speciation occurs; that is, whether the incipient species arises in a geographically localized area or from the whole of the ancestral species population.
Further work on other floral characters as well as the soil ecology and population genetics is needed to understand how these incipient species were established and to predict their likely long-term fate.
In contrast, we present a model in which assortative mating evolves in sympatry, and in which the resultant incipient species coexist.
Incipient species, presumably, later became isolated because mate choice was connected either ecologically or genetically to gall location (as with host races; Craig et al.
However, as Butlin (1987) noted, reinforcement can support speciation only if postzygotic isolation is not already complete between incipient species.
Alternatively, since the total land area of the separate islands is currently much less than that of Maui-nui, and if the periods of island separation were insufficient for complete speciation such that incipient species coalesced when sea levels dropped, fewer species than expected may occur there.