Malus halliana is an East Asian crabapple species of Malus, known by the common name Hall crabapple. Its Chinese name is chui si hai tang(垂丝海棠). It is generally considered to be a native tree of China, although some authors maintain that it is native to Japan, and was introduced into China.Flora of China, Malus halliana Koehne, 1890. 垂丝海棠 chui si hai tang
No narrative description available for this taxon yet.
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 Malus halliana has left across the world's sequence archives.
At a glance
DNA specimens7
Marker genes4
GenBank sequences7
eDNA detections5
Countries1
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.
★matK1★rbcL6★ITS★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB · GoaT · NCBI
The complete instruction manualMalus halliana 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.
Genome sizehow big the whole instruction manual is
Genome size777 510 000 bp
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
BACTERIUM Carsonella ruddii0.00016 Gb
FUNGUS0.04 Gb
INSECT0.25 Gb
THIS GENOME Malus halliana0.78 Gb
HUMAN3.2 Gb
WHEAT17 Gb
FERN Tmesipteris160.45 Gb
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.
Sequencing statusassembly quality — how far to trust these numbers
Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.
Assembly levelChromosome
07Deep time~17 Ma lineage
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin17 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type264 records
Wild obs. + sensor24
Museum / vouchered221
Cultivated / captive3
Other16
Range
Area of Occupancy AOO564 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy80% within 1 km
≤100 m 9≤1 km 3>10 km 3
15 georeferenced · 9 without coordinates
Open the mapobservation + sensor24
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 accuracy44% within 1 km
≤100 m 2≤1 km 2≤10 km 3>10 km 2
9 georeferenced · 212 without coordinates
Open the institutions mapphysical evidence221
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Coordinate accuracy67% within 1 km
≤1 km 2≤10 km 1
3 georeferenced
Open the mapnot free-living3
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 institutions33 of 54 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Beijing, CN
58
Kunming, CN
23
Chengdu, CN
21
Paris, FR
17
Siouxland Heritage Museumlocation not on record
14
Cambridge, US
6
Institute for Agricultural Bacteriology and Fermentation Biologylocation not on record
5
National Institute of Biological Resourceslocation not on record
5
Changsha, CN
4
Nanjing, CN
4
Yangling, CN
4
Wuhan, CN
3
Chongqing, CN
3
Nanjing, CN
3
Oulu, FI
3
Bronx, US
2
Jiangxi Universitylocation not on record
2
Seoul, KR
2
Chongqing Museumlocation not on record
2
Wuhan, CN
2
nlocation not on record
2
Universidad Católica de Santa Maríalocation not on record
2
Dekalb, US
2
Herbarium of South China Botanical Gardenlocation not on record
2
Nanyue Arboretumlocation not on record
1
Adam Mickiewicz University in Poznańlocation not on record
1
Guilin, CN
1
“Manash Kozybayev North Kazakhstan University" NPLClocation not on record
1
Zhejiang Universitylocation not on record
1
Bangkok, TH
1
Toyota city nature sanctuarylocation not on record
1
Saint Louis, US
1
Taipei, TW
1
Kew, GB
1
University of Stellenboschlocation not on record
1
Oiso Municipal Museumlocation not on record
1
College Park, US
1
Otaru, JP
1
Tsukuba, JP
1
Central China Agricultural Universitylocation not on record
1
Central China Normal Universitylocation not on record
1
WNNUlocation not on record
1
Shanghai, CN
1
Taipei, TW
1
EMTCMlocation not on record
1
Cambridge, US
1
West China Subalpine Botanical Gardenlocation not on record
1
Chiba, JP
1
Taipei, TW
1
Xian, CN
1
Tuscaloosa, US
1
SDFlocation not on record
1
Uppsala, SE
1
Columbia, US
1
54 institutions · 221 of 221 vouchered records shown
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
09Environmental DNA5 detections
Where the DNA of Malus halliana 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 found5
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map1 country0
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.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median22.5 °C 17.1–27.9
Seasonal swing summer↔winter21.2 °C
Max temp (day)25.2 °C 19.8–30.6
Min temp (night)19.0 °C 13.3–24.7
Precipitation321 mm/mo 275–366
Air humidity66.7 % 63.8–69.6
Moisture balance188 mm/mo 111–265
Vapour deficit1,017 Pa 627–1,407
Wind speed3.30 m/s 3.00–3.60
Cloud cover47.0 % 41.6–52.5
CHELSA 1981–2010, ~9 km grid, at location & month of 2 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
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.
WikipediaWikimedia Foundation8 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility264 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics7 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
WikidataWikimedia Foundationstructured facts↗