Restriction Digest – Oly gDNA for RAD-seq w/AlfI

The previous attempt at making these RAD libraries failed during the prep-scale PCR, likely due to a discrepancy in the version of the Meyer Lab protocol I was following, so I have to start at the beginning to try to make these libraries again.

Since the input DNA is so degraded, I’ve repeated this using 9μg of input DNA (instead of the recommended 1.2μg). This should increase the number of available cleavage sites for AlfI, thus improving the number of available ligation sites for the adaptors.

Used a subset (10 samples) from the Ostrea lurida gDNA isolated 20150916 to prepare RAD libraries.

Followed the 2bRAD protocol (PDF) developed by Eli Meyer’s lab.

Prepared 9.0μg of each of the following samples in a volume of 9.5μL:

Google Sheet: 20151028_RADseq_DNA_calcs

Prepared master mix for restriction enzyme reaction:

**REAGENT** **SINGLE REACTION (μL)** **x11**
DNA 9.5 NA
10x Buffer R 1.2μL 13.2μL
150μM SAM 0.8μL 8.8μL
AlfI 0.5μL 5.5μL

Combined 2.5μL of the master mix with 9.5μL of each DNA sample in 0.5mL snap cap tubes. Incubated @ 37C O/N in thermal cycler (PTC-200; no heated lid).