Identification of a novel sex determining chromosome in cichlid fishes that acts as XY or ZW in different lineages

Almost all mammals (including humans) share the same sex chromosomes, whereby individuals with a Y chromosome are male (XY) and individuals with two X chromosomes (XX) are female. Male elephants, cats and men all have a very similar Y chromosome that evolved in their common ancestor 180 million years ago. In fishes, sex determination is … More Identification of a novel sex determining chromosome in cichlid fishes that acts as XY or ZW in different lineages

New PNAS paper on the parallel evolution of two hybrid races of Heliconius butterflies

This PNAS paper is the result of a very fruitful collaboration with Frank Chan and Marek Kucka from the Max Planck Institute in Tübingen, Germany, who developed a new linked-read sequencing technology. Their method allows extremely cheap sequencing and provides high-quality data that even allows to assess chromosomal rearrangements for very low costs. Our joint … More New PNAS paper on the parallel evolution of two hybrid races of Heliconius butterflies

The Persistence of Polymorphisms across Species Radiations

Gabriel Jamie and I wrote a TREE review on the persistence of polymorphisms across species radiations. Polymorphisms, i.e. the presence of different variants/morphs in the same species, are often viewed as precursors to species whereby the different morphs evolve into different species. The presence of polymorphisms has been linked to increased speciation rates. However, in … More The Persistence of Polymorphisms across Species Radiations

Hybridisation and ecological opportunity together explain the rapid cichlid diversification in Lake Mweru

In this paper published in Nature Communications, we show that many new cichlid fish species evolved Lake Mweru, all of which evolved from hybrid origin. We show that in the nearby Lake Bangweulu, there are no new cichlid species and no evidence for hybridisation. This paper shows that the coincidence of ecological opportunity and hybridisation … More Hybridisation and ecological opportunity together explain the rapid cichlid diversification in Lake Mweru

Moving to Cambridge!

I am very happy to announce that on 1 October, I will start a St John’s College research fellowship at University of Cambridge! I will work with Chris Jiggins on Heliconius butterflies and also develop my own study system.