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Date: | Mon, 27 Jul 1998 08:30:28 -0500 |
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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
>
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