Defining species when there is gene flow

Ziheng Yang & Xiyun Jiao
Whatever one’s definition of species, it is generally expected that individuals of the same species should be genetically more similar to each other than they are to individuals of another species. Here we show that in the presence of cross-species gene flow, this expectation may be incorrect. We use the multispecies coalescent model with migration or introgression to study the impact of gene flow on genetic differences within and between species and highlight a surprising...
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6 downloads reported since publication in 2020.

These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?