I am working on molecular phylogeny in the order level. When I am extracting the sequences from NCBI Genebank, I found there are lot sequences marked as unverified. For concratenation of multiple genes, there are some sequences are missing or unverified in some species. May i take those for my phylogenetic analysis? Are there any problems in those sequences?
If there is no problem, then why those unverified sequences are present in NCBI Genebank??