Random Hexamer PCR Amplification from Low Concentration Jurassic-Aged Halite
Faculty Mentor Information
Dr. Caryn Evilia, Idaho State University
Presentation Date
7-15-2026
Abstract
The Redmond Salt Mine contains Jurassic-aged halite deposits formed from the evaporation of the ancient Sundance Sea. During crystallization, microorganisms and other biological material may have become trapped within salt crystals, creating sealed microenvironments that could preserve biomolecules over long periods of time. Because salt can slow biological degradation, these deposits may provide valuable insight into the long-term stability of environmental DNA.
This study evaluates the feasibility of amplifying extremely low concentrations of DNA using random hexamer primers and polymerase chain reaction (PCR). A known DNA mixture was serially diluted and amplified under four distinct PCR conditions to assess primer sensitivity, consistency, and reproducibility. Successful amplification was observed at several concentrations, indicated by distinct PCR bands. Successful amplification was also noted for control samples from the Great Salt Lake.
These findings demonstrate that random hexamer PCR can detect and amplify very low levels of DNA, providing a foundation for future work analyzing environmental samples from the Redmond Salt Mine to determine whether preserved DNA can be recovered from ancient halite deposits.
Random Hexamer PCR Amplification from Low Concentration Jurassic-Aged Halite
The Redmond Salt Mine contains Jurassic-aged halite deposits formed from the evaporation of the ancient Sundance Sea. During crystallization, microorganisms and other biological material may have become trapped within salt crystals, creating sealed microenvironments that could preserve biomolecules over long periods of time. Because salt can slow biological degradation, these deposits may provide valuable insight into the long-term stability of environmental DNA.
This study evaluates the feasibility of amplifying extremely low concentrations of DNA using random hexamer primers and polymerase chain reaction (PCR). A known DNA mixture was serially diluted and amplified under four distinct PCR conditions to assess primer sensitivity, consistency, and reproducibility. Successful amplification was observed at several concentrations, indicated by distinct PCR bands. Successful amplification was also noted for control samples from the Great Salt Lake.
These findings demonstrate that random hexamer PCR can detect and amplify very low levels of DNA, providing a foundation for future work analyzing environmental samples from the Redmond Salt Mine to determine whether preserved DNA can be recovered from ancient halite deposits.