Abstract:2 4Molecular ecologists seek to genotype hundreds to thousands of loci from hundreds to thousands 2 5 of individuals at minimal cost per sample. Current methods such as restriction site associated 2 6 DNA sequencing (RADseq) and sequence capture are constrained by costs associated with 2 7 inefficient use of sequencing data and sample preparation, respectively. Here, we demonstrate 2 8RADcap, an approach that combines the major benefits of RADseq (low cost with specific start researchers to process RADseq data using traditional pipelines, and we tested the RADcap RADcap method: 1) can methodologically reduce (to <5%) and computationally remove PCR primer costs of only a few hundred dollars.