Former members of the group
Pádraic is broadly interested in the fields of population genetics and molecular evolution. His main research interests concern understanding the evolutionary forces that shape the patterns of polymorphism within and between species. He graduated from Hanna's group in November 2013 with the thesis: "Neurospora tetrasperma from natural populations: toward the population genomics of a model fungus". He is now working at the Array Platform in Uppsala.
Rebecka started as a graduate student in August 2007 and finished successfully in March 2012. Her work focused on the evolution of reproductive systems in Neurospora, with an emphasis on the mating type- and pheromone receptor genes. Rebecka is currently working for a private company.
Yu graduated from Hanna's group in 2013 with the titel of his PhD-thesis being: "Genome Evolution of Neurospora tetrasperma". In his PhD Yu used genomic analyses to investigate the molecular evolution of Neurospora species, with a main focus on N. tetrasperma. Yu is currently holding a position at the South China Agricultural University in Guangzhou, China.
I did my PhD with Hanna as main advisor, on the topic of reproductive systems in Neurospora. I graduated in 2011, and in the fall of 2015, I reentered the group in the third year of my VR-funded postdoc concerning imprinting in the basidiomycete Schizophyllum commune, in which I studied the effects of parental origin on gene expression and methylation in the fungal heterokaryon. I have now taken on a job at FOI.
Ioana Onut Brännström
I graduated as a PhD in June 2017, with Hanna Johannesson as my main supervisor and Leif Tibell as my second supervisor. My research subject concerns a special group within the fungal world: the symbiotic fungi called LICHENS. I focus my study in investigating the life history and world phylogeography of the arctic and alpine lichen Thamnolia vermicularis. By using this species as model organisms and by combining genomic, ecologic and evolutionary methods I strive to disentangle the mechanisms behind lichen symbiosis. I have now moved on to a postdoc with Fabien Burki, at Uppsala university.
I graduated as a PhD at SLU in March of 2017, with Hanna as second advisor, on a project concerning the ecology and evolution of the lichens of the genus Letharia. We are investigating the genomes of Letharia species using NGS data. Currently, I am postdoc with Toby Spribille at the University of Alberta.
Jesper started his PhD with Hanna Johannesson in April 2013 and graduated in November 2017. Jesper worked on the genomics and evolutionary history of a type of selfish genetic elements which found in Neurospora: the spore killers. He has now moved on for a postdoc in Santa Cruz, CA.
I joined Hanna Johannesson’s group in November 2016 for one year. I investigate genome landscapes using population genomics tools and a demographic history of putative species within filamentous fungus Neurospora tetrasperma. These data will contribute to our understanding of speciation patterns and evolutionary history in fungi. I am currently back in Palacky University Olomouc.
Bart studied how sexual reproduction has led to asymmetries between mating partners: sexes, mating types, or other (in)compatibility systems, and what the consequences of this are. Specifically he studied the evolution of anisogamy using the yeast Schizosaccharomyces pombe and the consequences of separate sexes using the orange bread mold Neurospora crassa.
Jennifer was studying how organisms achieve different rates and types (e.g. interspecific or intraspecific) of genetic exchange and the consequnces of this. She explored these issues in two experimentally tractable fungi, N. tetrasperma and N. crassa. Using experimental and experimental evolution approaches, she quantified the performance effects of interspecific introgression on the mating type chromosome of N. tetrasperma, and looked for tradeoffs associated with different reproductive roles in N. crassa. Jennifer has now started her own lab here at the Systematic biology program.
Eric was in the Johannesson group since 2015-2016, on a Carl Trygger scholarship. His research was on spore killing in the fungus Podospora anserina. Spore killing is the manifestation of a selfish gene that is cheating on Mendels first law of equal segregation, by inhibiting the development of spores that do not carry the gene. Such elements are known as meiotic drive elements or segregation distorters, and found in many different species. The Spore killers in Podospora are interesting because several distinguishable elements with a similar but not equally powerful killing mechanism have been found. Eric investigated the evolution of these elements with a mainly experimental approach, focusing on different fitness aspects of spore killing to find out which conditions favor Spore killer elements.
During 2014-2015, Ruxandra was a postdoc in the Johannesson group, on a scholarship from the Wenner-Gren foundation. Ruxi's research focused on the phenotypic effects of spore killing in Neurospora.
Anastasia was a post-doc with Hanna from 2009 to 2011, on a Carl Trygger fellowship. She was using different species of the fungal genus Neurospora to study the evolution of reproductive systems, as reflected at the genome level, with a particular focus on transposable elements. Her research focused on obligate selfing taxa of the genus and spanned bioinformatics, molecular evolution and gene expression approaches.
After receiving his PhD at the Swedish Agricultural Sciences (SLU), Magnus came to our group in the spring of 2005 for a one year post-doc (financed by the Carl Trygger Foundation). He worked primarily with analyses of expression of the genes encoding pheromones and their receptors in intra- and interspecific matings of Neurospora. He is now back at SLU as an assistant professor.
Audrius completed his PhD at the Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, and came to the group in the summer of 2006 for a two year post-doc (financed by the Sven and Lilly Lawski foundation). During his post-doc developed the new project of mating-type chromosome evolution in Neurospora tetrasperma. In the fall of 2008 Audrius returned to the Agricultural University of Uppsala as an Assistant professor, financed by the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS).
Timothy Yong James
After a PhD and post-doc at Duke University, Tim joined the group as a Wenner-Gren post-doc during 2006 and 2007. During his post-doc in Uppsala Tim studied the evolutionary significance of imbalanced nuclear ratios within heterokaryons of the basidiomycete fungus Heterobasidion parviporum. Now, Tim has his own lab at the Department of Ecology and Evolutionary Biology, University of Michigan.
After completing his PhD at the Swedish University of Agricultural Sciences in September 2008, Nicklas received a grant from Sven and Lilly Lawski foundation to start a two and a half year period as a post-doc in the group. He was particularly interested in nuclear imbalances in the mycelium and perithecia of developing Neurospora tetrasperma individuals, as well as mating-type specific gene expression in Neurospora. He returned to SLU in 2011 and is now employed at Bergvik skog
As a postdoc in Hanna's lab, Carrie investigated several facets of genome evolution in the fungal model Neurospora. Specifically, she studied evolution of the non-recombining region on the sex (mat) chromosomes in N. tetrasperma, the evolution of optimal codons in populations of N. crassa, and the evolution of proteins and gene expression across sexual and non-sexual tissues in the Neurospora genus. The research identified key shifts in selective pressures acting on proteins, synonymous codons, and expression within these fungal organisms, and revealed crucial factors shaping their short-term and long-term molecular evolution.
Cécile joined the Johannesson group in September 2014 on a Marie-Curie scholarship. She is interested in intraorganismal variation and selection, and used the Neurospora nuclei and mycelia for this purpose. Cécile is now back in France, Université Rennes
Anushree came to the group in February 2016, for a 2 year postdoc. She was exploring the genomes of Neurospora for structural variants. These can be analyzed from a comparative and population genomic framework to address general aspects of genome evolution and connect them to processes such as genome size evolution, mating system evolution, speciation and meiotic drive. Anushree is currently a researcher at SLU.