High priority taxa

Following taxa (6 out of 6) were found to be high priority taxa to collect:

  • E. africana
  • E. indica
  • E. jaegeri
  • E. kigeziensis
  • E. multiflora
  • E. tristachya

See the priorities list here

Identified gaps for Eleusine genepool

(see downloads)

We found data for 6 wild species (E. africana, E. indica, E. jaegeri, E. kigeziensis, E. multiflora, E. tristachya). The different taxa are classified as follows, according to their closeness to the cropped species E. coracana using Maxted and Kell (2009) as follows:

Primary wild relatives
Secondary wild relatives
Tertiary wild relatives
E. africana
E. tristachya
E. jaegeri
E. indica
E. floccifolia
E. multiflora
E. kigeziensis
E. intermedia
E. compressa

The analysis dataset (download) contained 73 observations (excluding E. indica as it is a noxious weed and for which the number of samples was 383), with 70 (96%) being herbarium specimens and 3 (4%) being genebank accessions. The average number of total samples per taxon was 15 (standard deviation of 21), which indicates that the information is really poor in all taxa; however, E. tristachya is presenting a relatively high number of data points with 52 herbarium specimens.

The gap analysis of the Eleusine genepool found that there all the 6 taxa under are either underrepresented or not represented in genebank holdings, including the weed E. indica, which is not regarded as a very high priority species as it is distributed along with the cropped species E. coracana as a weed, 4 of these taxa have less than 10 observations in total, which indicates the urgent need of a collecting mission for them (or the need of more genebank and herbarium data readily available). E. tristachya and E. indica potential sampling zones were however mapped out , and for those species with no potential distributions herbarium samples were used as basis for defining future likely sampling zones.

Potential sampling richness

GE View in Google Earth

Eleusine high priority taxa were found to be distributed in South America and Africa. Zones in the figures above are those in which the species is likely to exist and no genebank accessions have been collected.

Potential sampling zones

GE View in Google Earth

The greatest sampling-richness was found in Santa Cruz (Bolivia), Tanzania and part of its border with the Democratic Republic of Congo and Rwanda, principally.

Brief description of data used in the analysis

East Africa is considered as the centre of diversity of the genus. Species from this genera are distributed in the tropical and subtropical parts of Africa, Asia and South America (as some of our records show). The table below shows the number of records (herbarium, germplasm, total) used per species for the Eleusine genepool gap analysis.

Species
Genebank accessions
Herbarium samples
Total
Eleusine africana
0
6
6
Eleusine indica
0
383
383
Eleusine jaegeri
0
10
10
Eleusine kigeziensis
3
0
3
Eleusine multiflora
0
2
2
Eleusine tristachya
0
52
52

Species’ taxonomy was reviewed using Maxted and Kell (2009) as a first stage, the GRIN taxonomical and the Royal Botanic Gardens, Kew taxonomy database. After cross-checking and correcting both synonyms and orthography of the species’ names, a thorough georeferencing process is carried out to obtain a spatially explicit database containing as many records as possible for each species. After this, records outside continental boundaries were deleted and a final dataset was produced for analyses (download dataset).

These are the 53 different collections from which data were readily available:

  1. Arizona State University Vascular Plant Herbarium
  2. Australian National Herbarium (CANB)
  3. Biodiversidad de Costa Rica
  4. Bishop Museum Natural History Specimen Data
  5. Botanical Society of the British Isles - Vascular Plants Database
  6. Bundesamt fuer Naturschutz / Netzwerk Phytodiversitaet Deutschland
  7. California State University, Chico
  8. Canadian Museum of Nature Herbarium
  9. Database Schema for UC Davis [Herbarium Labels]
  10. Fairchild Tropical Botanic Garden Virtual Herbarium Darwin Core format
  11. Galapagos grasses and sedges
  12. Herbario de la Universidad de Salamanca: SALA
  13. Herbario de la Universidad de Sevilla, SEV-Historico
  14. Herbario del Instituto de Ecología, A.C., México (IE-BAJIO)
  15. Herbario del Instituto de Ecologí­a, A.C., México (IE-XAL)
  16. Herbarium (UNA)
  17. Herbarium of Oskarshamn (OHN)
  18. Herbarium Specimens of Bonin and Ryukyu Islands
  19. Herbarium Specimens of Museum of Nature and Human Activities, Hyogo Pref., Japan
  20. Herbarium Universitat Ulm
  21. Herbarium Willing
  22. Herbier de la Guyane
  23. Instituto de Ciencias Naturales
  24. Israel Nature and Parks Authority
  25. Lund Botanical Museum (LD)
  26. Magnoliophyta- Taiwan Biodiversity Data for GBIF
  27. Missouri Botanical Garden
  28. New Zealand National Plant Herbarium (CHR)
  29. Nordic Herbarium (S)
  30. NSW herbarium collection
  31. Observations du Conservatoire botanique national du Bassin parisien.
  32. Phanerogamie
  33. Plants of Papua New Guinea
  34. Real Jardin Botanico (Madrid), Vascular Plant Herbarium (MA)
  35. Repatriación de datos del Herbario de Arizona (ARIZ)
  36. Specimen Database of Colorado Vascular Plants
  37. Staatliches Museum fuer Naturkunde Stuttgart, Herbarium
  38. SysTax
  39. The AAU Herbarium Database
  40. The System-wide Information Network for Genetic Resources (SINGER)
  41. Tiroler Landesmuseum Ferdinandeum
  42. United States National Plant Germplasm System Collection
  43. Universidad de Extremadura, UNEX
  44. Universidad de Málaga: MGC-Cormof
  45. Universidad de Oviedo. Departamento de Biología de Organismos y Sistemas: FCO
  46. University and Jepson Herbaria DiGIR provider
  47. USDA PLANTS Database
  48. USU-UTC Specimen Database
  49. Utah Valley State College Herbarium
  50. Vascular Plant Collection
  51. Vascular Plant Herbarium, Oslo (O)
  52. Vascular Plant Type Specimens
  53. Vascular plants of south-central China

Downloads

Climatic niche model for E. indica (Potential distribution model)
Climatic niche model for E. tristachya
Predicted species richness under current climatic conditions
Predicted species richness under future climatic conditions (year 2050, scenario SRES-A2a)
Changes on predicted species richness due to climate change
Sampling density (200km cell size) for germplasm accessions
Sampling density (200km cell size) for herbarium samples
Conservation priorities list for Eleusine genepool
Dataset used for this analysis

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