DNA barcoding and species delimitation of the genus <i>Oxynoemacheilus</i> (Teleostei: Nemacheilidae) in Anatolia

Bektas Y., Aksu İ., Kaya C., Bayçelebi E., Turan D.

JOURNAL OF FISH BIOLOGY, cilt.101, sa.3, ss.505-514, 2022 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 101 Sayı: 3
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1111/jfb.15114
  • Dergi Adı: JOURNAL OF FISH BIOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Animal Behavior Abstracts, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, EMBASE, MEDLINE, Veterinary Science Database
  • Sayfa Sayıları: ss.505-514
  • Anahtar Kelimeler: COI, DNA barcoding, Oxynoemacheilus, species delimitation, taxonomy, FRESH-WATER FISHES, TIGRIS RIVER, LOACH, DRAINAGE, GAP, IDENTIFICATION, BIODIVERSITY, DIVERSITY, TAXONOMY, SCALE
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

The DNA barcoding approach was used for the determination of evolutionary relationships and species delimitation of the genus Oxynoemacheilus (Teleostei: Nemacheilidae). The COI barcode region (615 bp amplicon) was used to barcode 444 individuals from 64 morphologically identified species in the genus Oxynoemacheilus and 189 haplotypes were identified. The average of the interspecific p distance (9.59%) was about 21-fold higher than the average intraspecific distance (0.44%). A general genetic threshold of 1.46% sequence divergence was defined for species delimitation. The multiple species delimitation methods (BCM, GMYC, bPTP and TCS) revealed a total of 62 molecular operational taxonomic units for 64 morphospecies with a new loach species from the BuyukMelen River. Neighbour-joining, maximum likelihood and Bayesian inference analyses indicated that all haplotypes were clustered into 62 clades, which corresponded to Oxynoemacheilus species, with strong bootstrap support (>= 95%). Furthermore, all samples grouped in concurrence with the taxonomic status of the species except for species groups (O. germencicus-O. cinicus-O. mesudae and O. leontinae-O. namiri) that were showed intraspecific overlap in genetic diversity for COI-based barcodes. In conclusion, our analyses indicate that COI-based barcodes provide reliable species discrimination. Therefore, we currently recommend COI barcodes as the suitable barcode for genus Oxynoemacheilus.