AgreenSkills session, year: 1st session, 2014
Receiving laboratory: AGAP Genetic Improvement and Plant Adaptation Montpellier, France
Country of origin : Canada
Investigation of selection gradients and local adaptation in a highly selfing species
In the context of unprecedented anthropogenic forcing in the living world, the mechanisms and speed of evolution remain key to understand the dynamics of adaptation. Measuring selection in natural populations allows identifying the phenotypic traits and the environmental factors involved in the adaptive process. This project aims at measuring the fitness of a genotype as a change in frequency over its entire life cycle. This can easily been done in predominantly self-fertilizing species. I am using population reciprocal transplant experiments to investigate local adaptation and selection on flowering time in natural populations of the model legume species Medicago truncatula.
I obtained a Bioscience Master from the Ecole Normale Supérieure of Lyon (ENSL) and I did a PhD in evolutionary ecology at the University Montpellier II. During my PhD, I quantified contemporary microevolution in natural populations of brine shrimp, a non-model organism using statistical analyses of life history and fitness data (generalized linear models, survival analyses). In my first post-doctorate at the University of Ottawa, I investigated condition-dependent sex in the model filamentous fungus Aspergillus nidulans. I used whole genome-sequencing (Illumina Hi-Seq) to compare the mutation rate of mutation accumulation lines that have been propagated either sexually or asexually. I am generally interested in getting a better understanding of the influence of mating systems on the adaptation of natural populations.
Nougué O., Flaven E., Jabbour-Zahab R., Rode N.O., Dubois M.-P., Lenormand T. (2015). Characterization of nine new polymorphic microsatellite markers in Artemia parthenogenetica, Biochemical Systematics and Ecology, 58,59-63.
Rode N.O., Lievens E.J.P., Flaven E., Segard A., Jabbour-Zahab R. & Lenormand T. (2013). Cryptic microsporidian parasites differentially affect invasive and native Artemia spp., International Journal for Parasitology, 43, 795–803.
Rode N.O., Landes J., Lievens E.J.P., Flaven E., Segard A., Jabbour-Zahab R., Michalakis Y., Agnew P., Vivarès C.P. & Lenormand T. (2013). Cytological, molecular and life cycle characterization of Anostracospora rigaudi n. g., n. sp. and Enterocytospora artemiae n. g., n. sp., two new microsporidian parasites infecting gut tissues of the brine shrimp Artemia, Parasitology, 140, 1168–1185.
Rode N.O. † , Lievens E.J.P. † , Flaven E., Segard A., Jabbour-Zahab R., Sanchez M.I. & Lenormand T. (2013). Why join groups? Lessons from parasite-manipulated Artemia. Ecology Letters, 16, 493-501. † Equal contribution
Sánchez M.I., Rode N.O., Flaven E., Redón S., Amat F., Vasileva G.P. & Lenormand T. (2012). Differential susceptibility to parasites of invasive and native species of Artemia living in sympatry: consequences for the invasion of A. franciscana in the Mediterranean region. Biological Invasions, 14, 1819-1829.
Rode N.O., Charmantier A. & Lenormand T. (2011). Male-female coevolution in the wild: evidence from a time series in Artemia franciscana. Evolution, 65, 2881-2892. Rode N.O. & Morrow E.H. (2009). An examination of genetic variation and selection on condition in Drosophila melanogaster males. Entomologia experimentalis et applicata, 131, 167-177.
2012: Young Investigator Prize from the Bettencourt Foundation (25 000€)