Uncovering cryptic genetic divergence across environmental gradients

A new study published in Evolution Letters suggests that large blocks of linked genes play a key role in maintaining adaptation to local conditions despite extensive connectivity across latitudes in an estuarine fish. Here, Nina Overgaard Therkildsen and her co-authors explain how this study highlights that field observations of phenotypic similarity across a species’ range … Continue reading Uncovering cryptic genetic divergence across environmental gradients

Hybridizing toads with different sex chromosomes

A new study published in Evolution Letters shows that species with different sex chromosomes can interbreed. Lead author Prof Christophe Dufresnes tells us more. How do organisms become male or female? It varies between vertebrates. Humans, like all mammals, do it with a Y chromosome – a chromosome that carries a “male determining” gene that … Continue reading Hybridizing toads with different sex chromosomes

An ancient association? Crickets disperse seeds of an early-diverging orchid

A new study published in Evolution Letters presents evidence of the apparently unusual seed dispersal system by crickets and camel crickets in Apostasia nipponica (Apostasioideae), acknowledged as an early-diverging lineage of Orchidaceae. Lead author Dr. Kenji Suetsugu tells us more.  Seed dispersal is a key evolutionary process and a central theme in terrestrial plant ecology. Animal-mediated seed … Continue reading An ancient association? Crickets disperse seeds of an early-diverging orchid