Genomic analyses of tomato traits associated to photosynthetic capacity and biomass accumulation.

GABRIEL LICHTENSTEIN; MARIANA CONTE

foz de iguazu

Congreso; 11th International Congress of Plant Molecular Biology; 2015

In this study we have recently collected a big dataset of the components involved in the regulation of fundamental physiological processes such as photosynthesis, respiration and related processes from an intensively used tomato model population comprised of seventy-two Solanum pennellii (wild tomato) introgression lines (ILs) which maintains the genetic background of Solanum lycopersicum elite domesticated cultivar (M82). By performing computational sequence analysis of the genomic regions associated to these traits we were able to identify and annotate few hundreds of loci in the above mentioned parental lines. These findings resulted in the selection of the best candidates to participate in the regulation of the yield-associated traits analyzed in this IL population: carbon assimilation rates, starch metabolism, shoot and root dry matter accumulation and nitrogen metabolism. Moreover, in order to shed some light on how these genes are regulated, we have identified the transposable elements governing the regulatory epigenetic context at each loci. Up-to-date, this work represents one of the largest studies of photosynthetic and growth parameters for tomato.