Home | About NASC | Address/Staff
Links | Ask a question | Help

NASC

The European Arabidopsis Stock Centre

Searching the ecotypes explained

  1. Search by Ecotype Name

    Each ecotype has at least two "names" in our catalogue. The first is the NASC Stock Number, e.g. N506173, N933. The second is the name assigned to the population from which the seed is derived. Population names are typically in the format xxx-n, where x is an alphabetic character and n is a number which is incremented between samples taken from the wild population. An example is Cvi-0, the first sample taken from the Cape Verdi Island population.

  2. Search by Location

    This is a keyword-based search, which will generally accept countries, e.g. France, Germany, Russia, but which may also accept town or city names such as Copenhagen.

  3. Search by Habitat

    Select a habitat keyword or key phrase from a drop-down list.

  4. Search by Altitude

    A significant minority of our ecotype stocks have data on the range of altitudes within which the parent population is found in the wild. If you want to find out which stocks grow within a range of altitudes, enter both the minimum and maximum values of that range (in meters) in their respective text boxes, e.g. Min = 200, Max = 240. The resulting list contains all stocks (for which altitude data are available) whose native range overlaps the search range, e.g. a stock whose native range is between 100 and 150 metres would not be returned by the above search, while a stock ranging natively between 160 and 220 metres would be returned.

    If you want to find those stocks which are found in the wild at a particular altitude rather than within a range of altitudes, then enter the same altitude as the minimum and maximum values for the search, e.g. Min = 320, Max = 320. Any stock whose native range includes that altitude will be returned.

  5. Search by Longitude

    A significant minority of our ecotype stocks have data on the range of longitudes within which the parent population is found in the wild. If you search a particular range, delimited by the values entered into the westerly and easterly boundary text boxes, you are specifying a slice of the Earth shaped like an orange segment, with the top and bottom of the segment corresponding to the poles. How "fat" the segment is corresponds to the number of degrees between the two boundaries. The search results will include any stock whose native range (also orange segment-shaped) overlaps the search range.

    Note that longitudes range from 180° west to 180° east, so you have to select both degrees and hemisphere (E or W) for your easterly and westerly boundaries. If you enter a westerly boundary but not an easterly boundary, the easterly boundary will be taken to be 180° east, which is the same as 180° west and corresponds approximately to the international dateline. If you enter an easterly but not a westerly boundary, the converse applies. Note also that if you wish to search within a range which spans the international dateline, you currently have to use two separate searches.

  6. Search by Latitude

    A significant minority of our ecotype stocks have data on the range of latitudes within which the parent population is found in the wild. Similarly to the way in which the altitude and longitude searches work, if you enter a particular range into the southerly and northerly latitude boundary text boxes, the search results will include any stock whose native range overlaps the search range.

    Note that latitudes range from 90° south to 90° north, so you have to select both degrees and hemisphere (N or S) for your boundaries. If you enter a southerly but not a northerly boundary, the search will extend to 90° north, i.e. it is effectively unbounded. The converse applies if you enter a northerly but not a southerly boundary.

  7. Search by Phenotype or Description

    These are keyword-based searches on phenotypic or generic descriptive attributes of the ecotypes.

  8. Search by Donor

    Enter a donor surname and search for an exact match.


You can specify an upper limit on the number of stocks displayed per results page (the default is 50). You can also limit your search to those stocks of which we have a photograph by clicking in the checkbox.