Its title: 'Pigment cell organization and genetic analysis of color pattern formation in the guppy’
Read more about Markus' research here.
For decades a small number of model species have rightly occupied a privileged position in laboratory experiments, but it is becoming increasingly clear that our knowledge of biology is greatly improved when informed by a broader diversity of species and evolutionary context. Arabidopsis thaliana has been the primary model organism for plants, benefiting from a high-quality reference genome sequence and resources for reverse genetics. However, recent studies have made a group of species also in the Brassicaceae family and closely related to A. thaliana a focal point for comparative molecular, genomic, phenotypic and evolutionary studies. In this Review, we emphasize how such studies complement continued study of the model plant itself, provide an evolutionary perspective and summarize our current understanding of genetic and phenotypic diversity in plants.
Willing E. M., Rawat V., Mandáková T., Maumus F., James G. V., Nordström K., Becker C., Warthmann N., Chica C., Szarzynska B., Zytnicki M.,Albani M., Kiefer C., Bergonzi S., Castaings L., Mateos J. L., Berns M. C., Bujdoso N., Piofczyk T., de Lorenzo L., Barrero-Sicilia C., Mateos I.,Piednoël M., Hagmann J., Chen-Min-Tao R., Iglesias-Fernández R., Schuster S. C., Alonso-Blanco C., Roudier F., Carbonero P., Paz-Ares J.,Davis S. J., Pecinka A., Quesneville H., Colot V., Lysak M. A., Weigel D., Coupland G. and Schneeberger K.
Despite evolutionary conserved mechanisms to silence transposable element activity, there are drastic differences in the abundance of transposable elements even among closely related plant species. We conducted a de novo assembly for the 375 Mb genome of the perennial model plant, Arabis alpina. Analysing this genome revealed long-lasting and recent transposable element activity predominately driven by Gypsy long terminal repeat retrotransposons, which extended the low-recombining pericentromeres and transformed large formerly euchromatic regions into repeat-rich pericentromeric regions. This reduced capacity for long terminal repeat retrotransposon silencing and removal in A. alpina co-occurs with unexpectedly low levels of DNA methylation. Most remarkably, the striking reduction of symmetrical CG and CHG methylation suggests weakened DNA methylation maintenance in A. alpina compared with Arabidopsis thaliana. Phylogenetic analyses indicate a highly dynamic evolution of some components of methylation maintenance machinery that might be related to the unique methylation in A. alpina.
May 29, 2015, 11 a.m.
EBIO Seminar Room
June 1 - Sept 6, 2015
June 3, 2015, 3 p.m.
MPH Lecture Hall
June 9-13, 2015
Detlef in Sweden, co-organizing the EMBO workshop 'Mechanisms of Plant Speciation'