Allocation of energy is critical to biological structure and function. Availability of nutrients to support life varies tremendously across time and environments. Given a limited resource pool, organisms allocate differentially to functions such as somatic maintenance, reproduction and storage. This differential allocation has a direct bearing on, for instance, how and why organisms age, why species differ extensively in reproductive output, and is thought to constrain the evolution of fitness. We use a multiparental mapping population to explore the genetic basis of the coordination of allocation with resource availability. We phenotyped a suite of interrelated allocation phenotypes in multiple dietary regimes to uncover a complete picture of the genetic basis of the coordination between resource availability and resource allocation, using the DSPR resource lines. We identify several genomic locations that influence how resources are partitioned differently when resource availability varies. These loci will also serve as focal candidates we will track over time in a future selection experiment for divergent allocation strategies.