Frequencies of correctness scores in the no-LOOCV of full-length query sets.

The number of correctly identified taxonomic levels is used as an index representing the degree of correctness of taxonomic assignment. This correctness index has the maximum value 6 when the taxonomic information at all the phylum/division, class, order, family, genus, and species levels is correctly assigned. On the other hand, the index has the minimum value 0 when taxonomic information at all the six taxonomic levels is erroneously assigned to a query or a query remains unidentified even at the phylum/division level. 1NN, 5NN, 97%, 99%, Bar, CNJ, RDP, NNC, and QC means 1-NN, 5-NN, 97%-NN, 99%-NN, Barcoder, ConstrainedNJ, RDPClassifier, NNCauto, and QCauto methods, respectively. (a) Animal COX1. (b) Bacterial/Archaeal 16S. (c) Fungal ITS. (d) Plant matK. (e) Plant rbcL. (f) Plant trnH-psbA.