Our proposal to modify the International Code of Nomenclature for algae, fungi, and plants to allow DNA sequences to serve as type material has just been published in Taxon. This proposal will be voted on at the XIX International Botanical Congress in Shenzhen, China, in July 2017. The proposal provides minimal details about how DNA sequences could be used as types (loci, sequence similarity cut-offs, informatics platforms, and analyses are not specified), leaving these details to be sorted by the taxonomic community.
Hawksworth, David L., Hibbett, David S., Kirk, Paul M., and Lücking, Robert. 2016. (308–310) Proposals to permit DNA sequence data to serve as types of names of fungi. Taxon 65: 899-900. PDF: hawksworth-et-al-2016-dna-types.