A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Polygonum erectum has left across the world's sequence archives.
At a glance
DNA specimens6
Marker genes5
GenBank sequences9
eDNA detections6
Countries2
The DNA barcodea real sequence read deposited for this species
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK2★rbcL5★rbcLa★ITS2★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualPolygonum erectum carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
Chromosomes2n = 40 n = 20
Ploidypolyploid inferred
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 401×CCDB · Cave1956
CCDB · Cave1956 — Love & Love a
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy67% within 1 km
≤100 m 6>10 km 3
9 georeferenced · 13 without coordinates
Open the mapobservation + sensor22
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy29% within 1 km
≤100 m 20≤1 km 98≤10 km 242>10 km 43
403 georeferenced · 301 without coordinates
Open the institutions mapphysical evidence704
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions71 of 95 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Philadelphia, US
62
Oregon State Universitylocation not on record
54
Chongqing Museumlocation not on record
48
Bloomington, US
37
Saint Louis, US
35
Chicago, US
33
Wuzhou, CN
31
Bronx, US
27
New Haven, US
24
University of Stellenboschlocation not on record
21
Madison, US
20
Emporia, US
15
Ann Arbor, US
14
Albuquerque, US
13
College Park, US
13
Denver, US
10
Allentown, US
10
Burlington, US
10
Williamsburg, US
9
Pullman, US
9
Chapel Hill, US
8
Tampa, US
8
Missoula, US
7
University of New Hampshirelocation not on record
7
Bangkok, TH
7
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
6
Université Lavallocation not on record
6
Bozeman, US
6
Staten Island, US
6
Québec, CA
5
Springfield, US
5
Montréal, CA
5
University of Wisconsinlocation not on record
5
McWane Science Centerlocation not on record
4
Clemson, US
4
Dekalb, US
4
Claremont, US
4
DOI/NPS, Greenbelt Parklocation not on record
4
WTUlocation not on record
4
Millersville, US
3
Philadelphia, US
3
Chicago, US
3
Fayetteville, US
3
Washington, US
3
St. Paul, US
3
Knoxville, US
3
BAYLUlocation not on record
2
Morgantown, US
2
University of Alberta Museumslocation not on record
2
Tuscaloosa, US
2
Lord Fairfax Community Collegelocation not on record
2
Vancouver, CA
2
Little Rock, US
2
Dover, US
2
Fullerton, US
2
GB
2
US
1
ASUlocation not on record
1
Mississippi State, US
1
Los Angeles, US
1
Lincoln, US
1
Tacoma, US
1
Jackson, US
1
Montréal, CA
1
MAlocation not on record
1
West Virginia Wesleyan Collegelocation not on record
1
Pittsburg, US
1
EL PASO, US
1
Otaru, JP
1
Corvallis, US
1
UMKClocation not on record
1
Meguro Parasitological Museumlocation not on record
1
Riverside, US
1
Norfolk, US
1
IDElocation not on record
1
Musee des Dinosaures d'Esperaza (Aude)location not on record
1
Russellville, US
1
University of Tennessee at Chattanoogalocation not on record
1
Karlsruhe, DE
1
Moscow, US
1
Green Bay, US
1
Waverly, US
1
Northridge, US
1
Miami, US
1
Oskarshamn, SE
1
Beijing, CN
1
LDlocation not on record
1
Spearfish, US
1
Flagstaff, US
1
Fredericksburg, US
1
USFSlocation not on record
1
Fort Worth, US
1
Mlocation not on record
1
Boise, US
1
Richmond, US
1
95 institutions · 680 of 704 vouchered records shown · 24 without an institution code
09Environmental DNA6 detections
Where the DNA of Polygonum erectum was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found6
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 6 detections have coordinates
Open the map0 countries0
vernal poolbarnyarddry clay soil of dooryard; few, same area as…
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility726 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI6 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics6 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype