Karl and Tonkawa are different varieties (cultivars) of wheat.  There are
existing genetic coefficients  for many different varieties of wheat
already established for the CERES-Wheat model.  Some other popular
varieties are TAM W 101, Scout, Triumph...  You can find this information
on page 209 volume 2 of the DSSAT v. 3.0 manual.
 
Once again, I am asking for the genetic coefficeints (P1V, P1D, P5, G1, G2,
G3, PHINT) for the Karl and Tonkowa varities of hard red winter wheat.
 
Sorry for the confusion.
 
Brandon Claborn
 
 
 
 
"Schnelle, Karl" <[log in to unmask]> on 07/27/98 08:41:42 AM
 
Please respond to DSSAT - Crop Models and Applications
      <[log in to unmask]>
 
 
 
 To:      [log in to unmask]
 
 cc:      (bcc: William B Claborn/bioen/dasnr/Okstate)
 
 
 
 Subject: Re: CERES-Wheat Coefficients
 
 
 
 
 
 
 
Since there has not been a lot of traffic on this list, I'll reply
again.
 
Paul, thanks for the def's of the GCs for wheat. Actually, I really
wanted Brandon to describe what "Karl"
and "Tonokawa" are...
 
Maybe because I never knew I was named after a wheat variety :-)
Karl
______________________________________________
Dow AgroSciences LLC          [log in to unmask]
9330 Zionsville Rd.                 PHONE: 317-337-3140
Indianapolis, IN 46268 USA    FAX: 317-337-3215
 
>----------
>From:  Wilkens, Paul W. <[log in to unmask]>[SMTP:[log in to unmask]]
>Sent:  Monday, July 27, 1998 8:30 AM
>To:    [log in to unmask]
>Subject:       Re: CERES-Wheat Coefficients
>
>Hello, Karl
>
>The definition of the wheat genetic coefficients are listed below.
>
>P1V   Relative amount that development is slowed for each day of
>      unfulfilled vernalization, assuming that 50 days of
>      vernalization is sufficient for all cultivars.
>P1D   Relative amount that development is slowed when plants are
>      grown in a photoperiod 1 hour shorter than the optimum (which
>      is considered to be 20 hours).
>P5    Relative grain filling duration based on thermal time (degree
>      days above a base temperature of 1 C), where each unit increase
>      above zero adds 20 degree days to an initial value of 430
>      degree days.
>G1    Kernel number per unit weight of stem (less leaf blades and
>      sheaths) plus spike at anthesis (1/g).
>G2    Kernel filling rate under optimum conditions (mg/day).
>G3    Non-stressed dry weight of a single stem (excluding leaf
>      blades and sheaths) and spike when elongation ceases (g).
>PHINT Phylochron interval; the interval in thermal time (degree days)
>      between successive leaf tip appearances.
>
>Paul
>
>Paul W. Wilkens
>International Fertilizer Development Center
>P.O. Box 2040
>Muscle Shoals, Alabama  35662 USA
>Tel      (256) 381-6600 (New Area Code!)
>Fax     (256) 381-7408 (New Area Code!)
>e-mail [log in to unmask]
>http://www.ifdc.org/
>
>"Once we've got the bugs ironed out, we'll be running on flat bugs."
>
>
>
>-----Original Message-----
>From: Schnelle, Karl [mailto:[log in to unmask]]
>Sent: Monday, July 27, 1998 8:09 AM
>To: [log in to unmask]
>Subject: Re: CERES-Wheat Coefficients
>
>
>And here I thought "Karl Tonkowa" forgot to include the variety names...
> Can you explain what these are, just for the benefit of the non-wheat
>people on the list?
>
>Karl
>Schnelle
>
>>----------
>>From:  Brandon Claborn[SMTP:[log in to unmask]]
>>Sent:  Monday, July 27, 1998 7:58 AM
>>To:    [log in to unmask]
>>Subject:       Re: CERES-Wheat Coefficients
>>
>>The varieties are "Karl" and "Tonkowa".  The row across the top is the
>>variable name for the genetic coefficients.
>>
>>Thanks,
>>Brandon Claborn
>>
>