2025 Volume 40 Issue 2 Article ID: ME24097
Digital PCR is a technique that quantifies target genes based on the absence or presence of the targets in PCR amplicons. The present study examined group-specific probes for the quantification of mcrA genes in six methanogenic archaeal groups and “Candidatus Methanoperedens” by digital PCR with the universal primers ML-f and ML-r. A digital PCR analysis of paddy field soil detected all the targets, with the dominant and minor groups being Methanomicrobiales and Methanobrevibacter spp., respectively (107 and 104 copies [g dry soil]–1). This method has the potential to reveal the dynamics of specific methanogenic archaeal groups in the environment.