Arabidopsis, a member of the Brassicaceae, is an annual plant related to many modern-day crops, including oilseed crops, turnip, cabbage, cauliflower, kale, and broccoli. Traditionally, research in Arabidopsis has appealed for this kinship with agronomically important species to justify its use as a model organism for the study of physiological, cellular, molecular, metabolic and developmental processes in plants. However, it is precisely its non-existent agronomic value which interest me: Arabidopsis has evolved under natural conditions and shows more potential to uncover adaptive loci than modern day crops bred by humans to maximize economically valuable traits at the potential expense of adaptive capacity. Arabidopsis has a vast collection of inbred accessions (ecotypes), and recent work provides high-quality full genome information of 1,135 inbred accessions collected from known sites with an extensive distribution range and well-studied population history (Alonso-Blanco et al. 2016; Durvasula et al. 2017).
My research aims to characterize the local environment of Arabidopsis. For this, we first created what we now describe as the “1001 environomes”, codifying environmental data for more than 200 environmental variables that provide a description of the local environment of the specie. The next logical step was to characterize the genome-wide genetic variation associated with these environmental variables (G×E). For this, I conducted GWAS analysis using each one of the environmental variables I extracted and considering it as a ‘phenotype.’ This analysis facilitates the study of the genetic basis of local adaptation in Arabidopsis. We then uncovered the genetic and phenotypic basis of local adaptation in Arabidopsis by relating 131 different Arabidopsis phenotypes with the set of environmental variables we characterized. This work has been recently published (Ferrero-Serrano and Assmann 2019), and combines the application of remote sensing, genomics, phenomics, whole plant physiology, and GWA techniques. I created a series of online tools for the study of the study of local adaptation in Arabidopsis that we named “Arabidopsis CLIMtools."
My current research aims to make use of the tools we provided for the study of local adaptation in Arabidopsis though a series of common garden experiments that aim to discover adaptive loci in relation to phenotypic traits and environmental variables that are relevant from an agronomic perspective.
Though my recent work, I have contributed to the study of local adaptation in Arabidopsis. However, we still cannot eat Arabidopsis, and my final goal is that basic research should be motivated by practical problem formulations that reflect real-world challenges. The real-world challenge is clear: once we identify loci as a genetic basis of local adaptation in a naturally evolving species, how do we translate this into crop species with nutritional and economic value? I am interested in translational approaches into rice as a model system for crop improvement.
The importance of rice to global agriculture was recognized during the Green Revolution when grain production increased dramatically as a result of the introduction of new high-yielding varieties of rice for use in the developing world. Dwarf rice varieties with reduced stature and other associated traits such as erect leaves were a cornerstone of Green Revolution breeding programs (Ferrero-Serrano, Cantos & Assmann 2019).
I am interested in the exploration of the genetic variation of rice to explore the genetic basis of dwarfism, and the role of heterotrimeric G proteins in regulating these dwarfing traits, in relation with abiotic stress, photoinhibition, photoprotection, and light use efficiency (Ferrero-Serrano and Assmann 2016, Ferrero-Serrano, Zu & Assmann 2019).