I am modeling aboriginal maize production using parameters derived from
Tohono maize.  My genetic parameters are as follows:

P1=200
P2=0.0
P5=610
G2=311
G3=7.4
PHINT=38.9

    When I run an experiment, I get GRAIN/m2=45, GRAINS/EAR=11.4, GRAIN YIELD
(kg/ha)=91 as opposed to the actual GRAIN/m2=892, GRAINS/EAR=208, and GRAIN
YIELD (kg/ha)=2050.  Clearly, 45 grains per ear is unrealistic.  While the
genetic parameters are on the low side they are basically in the range of other
varieties.  When I run an experiment with another variety, I get realistic
numbers.  Since the problem does not appear to lie in the genetic parameters, it
must lie elsewhere but I can not figure out exactly where.

    Any ideas where the problem may be?

--
Michael Pool, RPA
Anthropology/Geography Department
Austin Community College
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