Hybridization RAD (hyRAD) was developed for use on degraded samples, such as museum collections. Museums and preserved samples offer a rich source of valuable specimens, but their degraded DNA is unable to sustain the double digestion and sample fractionation required by ddRAD. To address this limitation, hyRAD uses biotinylated probes and streptavidin-covered beads to capture and enrich the fragments of interest.
The first step in the process is to generate a ddRAD library from high quality DNA, usually from an extant specimen. The fragments are size-selected and biotinylated. They can now be used as probes for hybridization capture of shotgun or ddRad libraries.