Sentences with phrase «reproductive barriers»

Our study revealed important aspects of the genetic architecture of differentiation in the early stages of divergence and allowed the identification of genomic regions that resist introgression and are likely to confer reproductive barriers in natural conditions.

«One way to study how speciation occurs is to look for examples where partial reproductive barriers exist but where genes are still exchanged.»

Evidence for mito - nuclear and sex - linked reproductive barriers between the hybrid Italian sparrow and its parent species.

Finding out why some hybrids make it and others don't may yield molecular details about how reproductive barriers between species are built, says evolutionary population geneticist Graham Coop of the University of California, Davis.

As flowers evolved intricate structures to attach pollinia — some orchids stick them smack between the eyes of their favorite insect species, for instance — reproductive barriers likely formed, giving birth to new species.

Two key questions dominate our work: (1) How and why do organisms diversify phenotypically, and (2) how and why do reproductive barriers evolve between populations; i.e., under what circumstances can we observe speciation?

This article appears in the November 11, 2017 issue of Science News with the headline, «Hybrids tell tales: When species manage to mix, they offer clues to reproductive barriers.»

Scientists still don't know whether the microbes can create the reproductive barrier in the first place, widen an already existing barrier, or even do both.

«These experiments can't tell us whether the microbes were actually causing speciation, but they were certainly a major contributor, adding to the reproductive barrier that was already in place,» Brucker said.