210 likes | 388 Views
Overview of DNA Barcoding and the Barcode of Life Initiative. Scott E. Miller, Chair, CBOL Executive Committee National Museum of Natural History Smithsonian Institution MillerS @si.edu ; http://www.barcoding.si.edu. Poor representation of systematics infrastructure in Africa.
E N D
Overview of DNA Barcoding and the Barcode of Life Initiative Scott E. Miller, Chair, CBOL Executive Committee National Museum of Natural History Smithsonian Institution MillerS@si.edu; http://www.barcoding.si.edu
Human resources also thinly distributed • Stuckenberg (1964): most systematics done outside of Africa, but only 7% of world entomologists working on Africa • Gaston & May (1992): only 4% of ecologists & 7% of systematists in Africa • Surveys by CABI (1993), ICIPE (1996), SAFRINET (1998) show same trends
Outreach to Africa • South Africa and Kenya involved from beginning of CBOL in May 2004 • Southern African regional workshop now • Eastern and Western regional workshops under discussion • African involvement in global campaigns (e.g., birds, fish, mosquitos, fruit flies)
Reactions to Barcoding: 2004 • From ecologists and other users:“This is what we need! How soon can we get started?” • From traditional taxonomists:“Species should be based on lots of characters, not just barcodes” • From forward-looking taxonomists:“Using molecular data as species diagnostics isn’t new, but standardization and broad implementation are great!” • From barcoding practitioners:“I had my doubts at the beginning, but it really works as a tool for identification (96% accurate in a recent mollusc paper) and it is at least as good as traditional approaches to discovering new species.”
A DNA barcode is a short gene sequence taken from standardized portions of the genome, used to identify species
D-Loop Small ribosomal RNA Large ribosomal RNA Cyt b ND1 ND6 COI COI ND5 L-strand ND2 H-strand ND4 COI ND4L COII ND3 ATPase subunit 8 COIII ATPase subunit 6 The Mitochondrial Genome
Uses of DNA Barcodes Applied tool for identifying regulated species: • Disease vectors, agricultural pests, invasives • Environmental indicators, protected species Research tool for assigning specimens to known species, including: • Life history stages, damaged specimens, gut contents, droppings “Triage” tool for flagging potential new species: • Undescribed and cryptic species
Species Identification Matters • Endangered/protected species • Agricultural pests • Invasive species • Disease vectors/pathogens • Hazards (e.g., bird strikes on airplanes) • Environmental quality indicators • Unsustainable harvesting • Fidelity of cell lines/culture collections
Uses of DNA Barcodes Research tool for assigning specimens to known species, including: • Life history stages, damaged specimens, gut contents, droppings
Uses of DNA Barcodes Applied tool for identifying regulated species: • Disease vectors, agricultural pests, invasives • Environmental indicators, protected species Research tool for assigning specimens to known species, including: • Life history stages, damaged specimens, gut contents, droppings “Triage” tool for flagging potential new species: • Undescribed and cryptic species 23% marine species in Pearl Harbor are alien or cryptogenic
What DNA Barcoding is NOT • Barcoding is not DNA taxonomy; no single gene (or character) is adequate • Barcoding is not Tree of Life; barcode clusters are not phylogenetic trees • Barcoding is not just COI; standardizing on one region has benefits and limits • Molecules in taxonomy is not new; but large-scale and standardization are new • NEVERTHELESS, Barcoding is helping to create a 21st century research environment for taxonomy
Wider Impacts of Barcoding: 2008 • Catalyzing interoperability of databases • Barcode data standards link sequences, specimens, species names and publications • Renewing the mission of museums • DNA recovery from formalin-fixed specimens • Promoting the growth of DNA banks • Expanding analytical toolbox for taxonomy • Improving the information infrastructure • Digital library initiative in taxonomy
Digitizing Taxonomic Literature • CBOL’s catalytic efforts: • Library-Laboratory meeting in London on electronic access to taxonomic literature • Led to formation of Biodiversity Heritage Library initiative • Proactive steps with PubMed to add taxonomic journals to online abstracts • Aggressive negotiation with publishers of barcoding papers
The Vision: Enabling research, product development, and dissemination Ideally, all data should be accessible: • From any location • In formats appropriate to users • With a single query for each data type • Using simple links • Interoperable across data sets … digitally
Collaborating with International Initiatives • Global Biodiversity Information Facility (GBIF) • Global Taxonomy Initiative (GTI) of Convention on Biological Diversity • BioNet International • Projects such as SABONET • Digital library • Genbank/EMBL/DDBJ • Leveraging “north” and “south” funding?
Planned Outreach • Regional meetings in: • Cape Town, South Africa, 7-8 April 2006, SANBI • Brazil, 2nd quarter 2006 • Southern Asia, mid-2007 • Nairobi, Kenya, October 2006 • Second International Barcode Conference • Southeast Asia, February 2007 • Support from CBOL, host governments and international development agencies