Descriptor Area - Faqs
How do I select alfalfa accessions that are resistant to downy mildew, and
have a growth habit that is semi-erect?
The first thing you need to do is find the Multiple Descriptor page for
Note that Descriptors are grouped by type.
Read how resistance and susceptibility is defined.
Look to see how many plants are resistant to Downy Mildew. Perhaps you
should enter a resistance of more than 50% into the form.
- Click Back to the form and set up the query using this specific
- In the field to the right of Downy Mildew, choose GREATER
- In the field to the right of this, type: 50
- Move down the list to find Plant Growth Habit
- Click on Plant Growth Habit to see how it is defined.
- Click on Code values to find the codes used.
Note that semi-erect is code 7
- Click Back to the form to enter your additional information
- In the field to the right of Plant Growth Habit, choose EQUAL
TO by leaving it alone.
- In the field to the right of this, choose: 7
- Click Submit Query
How do I identify cultivars that have the same attributes as the above
After getting the answer to the above FAQ, click Back twice to return
to the query form. Check to make sure that the above requirements are still
Downy Mildew GREATER THAN 50, Plant Growth Habit EQUAL TO
- Find Improvement status. Set Improvement Status=CULTIVAR
- Click Submit Query
How do I select accessions that have certain descriptor attributes and are
likely to be adapted to my climatic conditions?
Search for the descriptor attributes the same way you did above. Before you
submit your query, add to this information the country and/or state that the
material will be grown in that has similar ecogeographic conditions to yours.
Then submit your query.
I need to limit the number of accessions I will be screening. How can I
select a limited number of accessions that will give me an idea of the
diversity in the collection?
Go to the Multiple Descriptor Query page just like in the other
Put in the descriptor specifications that you want. To select a limited
number of accessions to give you an idea of the diversity in the collection,
- Find CORE SUBSET. In the field to the right of it, choose EQUAL TO ,
in the field to the right of that, choose Y
- Type in the scientific names you want
- Click Submit query
This will identify all accessions that are in the core collection for a
How do I pull out a list of accessions that have descriptor values similar
to an accession I found useful?
For information on a single accession, such as a cultivar or a PI number,
type it into the first box under the Simple Queries area.
- Scroll down and click on Observations
- For a given descriptor click on the value
- Click on Accessions with same code.
Note: you can also set up a multiple query form with the specific descriptor
How can I find out how many accessions have been evaluated for the
descriptor Bacterial Wilt for alfalfa?
Note: Since the clover and alfalfa descriptor lists contain data on multiple
taxa, be aware that if you go through "List of Descriptors",
"Descriptor report with frequency of observations" or "multiple
descriptor form" (without specifying taxa), and click on "observed
values", accessions listed may represent different species within the
How do I find out the distribution of responses observed for the given
trait Bacterial Wilt?
If descriptor has been used on only one species, or you do not care if the
report contains all evaluated species within the crop group,
If you want to know the distribution frequency for a given descriptor for a
specific taxa, request information from the curator.
How do I find the procedures used to carry out a specific evaluation?
Click on desired descriptor in either descriptor list or multi-query form,
read descriptor definition.
How do I find out where, when and who gathered the descriptor data for a
How do I find out how many individual evaluation studies have contributed
data for a specific descriptor?
- Click on desired descriptor in either descriptor list or multi-query form
- Study environments, indicating date and number of accessions will be listed
- Click on the specific study to obtain further information.
How do I obtain a list of descriptors that have been taken on the white
This can be done more easily in pcGRIN. Another way to
handle this is to contact the curator.