Journal
TRENDS IN ECOLOGY & EVOLUTION
Volume 35, Issue 9, Pages 795-808Publisher
CELL PRESS
DOI: 10.1016/j.tree.2020.04.007
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Funding
- Biotechnology and Biological Sciences Research Council (BBSRC) David Philips grant
- St John's College, Cambridge
- BBSRC [BB/J014109/1] Funding Source: UKRI
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Studies on polymorphisms have been foundational to our understanding of evolu-tion. The presence of different phenotypic morphs is sometimes considered a pre-cursor to speciation in which morphs evolve into different species. While speciation should initially reduce genetic variation in daughter versus parental species, a com-mon pattern is the recurrence of the same phenotypic polymorphism in many spe-cies of a clade. Despite the ubiquity of these persistent polymorphisms, there is little discussion of their evolutionary origins. How does the genetic variation underpin-ning such polymorphisms cross speciation boundaries? What selection pressures maintain the morphs in multiple daughter species? Using diverse case studies, we highlight the characteristics of polymorphisms and selection regimes influenc-ing the likelihood of polymorphism retention across species radiations.
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