New review paper on polymorphisms and speciation

May 5, 2020

TREE figure

In a new paper in Trends in Ecology and Evolution, Dr Gabriel Jamie and Dr Joana Meier explore the phenomenon that the same polymorphisms often recur in many members of a species radiation (e.g. colour/pattern morphs, heterostyly, mating types, shell chirality). This phenomenon is puzzling because speciation often represents a barrier to the inheritance of the ancestral genetic variation underpinning polymorphisms. Generally, only a subset of the ancestral population go on to become founders of the new species. They outline the characteristics of polymorphisms that help their underlying genetic variation get inherited from ancestral standing variation, re-introduced through introgression or re-invented through mutation and also explore the factors influencing whether the requisite balancing selection operates widely across daughter species so that polymorphisms are maintained in many members of the radiation.

News

Dr Gabriel Jamie gives a talk on mimicry in parasitic finches at the African BirdFair

Dr Gabriel Jamie gave a talk on mimicry in the parasitic finches of Africa at Birdlife South Africa’s Virtual African Birdfair. Please also see Dr Jessica van der Wal’s talk on our sister research project on honeyguide-human mutualism (more information at www.AfricanHoneyguides.com) and many other great research talks by our colleagues at the FitzPatrick Institute of African Ornithology. Also visit the amazing line-up of other talks at the Virtual African BirdFair, including a talk on bird art by the brilliant Faansie Peacock who has generously allowed us to use his illustrations in several of our scientific publications. Thank you BirdLife South Africa!

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Mairenn Attwood submits her MPhil thesis

Congratulations to Mairenn Attwood for successfully submitting her MPhil thesis at the University of Cambridge, entitled ‘Angry birds: does it pay a cuckoo to parasitise a highly aggressive host?’. In it, Mairenn asks whether high levels of aggression by fork-tailed drongos affect hawk mimicry by the African cuckoo, and whether it pays cuckoos to specialise on such aggressive hosts. An amazing feat of field experimental work in Zambia (in collaboration with Jess Lund), analysis and writing in just one year of research – well done Mairenn!

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Front cover of Trends in Ecology and Evolution

Dr Gabriel Jamie and Dr Joana Meier’s paper on the persistence of polymorphisms across species radiations is on the front cover of the September issue of Trends in Ecology and Evolution. The cover image provides a specific example of the trans-species polymorphisms that the paper explores. Here, a polymorphism in shell chirality that recurs across multiple species of Amphidromus snails . Photos by Menno & Jan Schilthuizen. You can read the full article here: https://tinyurl.com/ycgdw4lu

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