Development of the Generic APSIM Cereal Template to Enhance Functionality of Whole-Plant Modelling

McLean, Greg, Hammer, Graeme, Van Oosterom, Erik and Doherty, Alistair (2008). Development of the Generic APSIM Cereal Template to Enhance Functionality of Whole-Plant Modelling. In: M. Unkovich, Global Issues, Paddock Action: Proceedings of the 14th Australian Society of Agronomy Conference. 14th Australian Society of Agronomy Conference, Adelaide South Australia, (). 21-25 September 2008.


Author McLean, Greg
Hammer, Graeme
Van Oosterom, Erik
Doherty, Alistair
Title of paper Development of the Generic APSIM Cereal Template to Enhance Functionality of Whole-Plant Modelling
Conference name 14th Australian Society of Agronomy Conference
Conference location Adelaide South Australia
Conference dates 21-25 September 2008
Convener Austalian Society of Agronomy
Proceedings title Global Issues, Paddock Action: Proceedings of the 14th Australian Society of Agronomy Conference
Place of Publication Gosford Australia
Publisher The Regional Institute
Publication Year 2008
Sub-type Fully published paper
ISBN 1920842349
Editor M. Unkovich
Total pages 5
Collection year 2009
Language eng
Abstract/Summary The utility of crop growth and development models for investigating emergent behaviour of complex gene-to-phenotype interactions is limited if such models rely on algorithms that describe key aspects of crop growth and development too simply. While this approach has proven adequate for predicting crop responses to agronomic management and some major genetic factors (e.g. physiological maturity), attempts at connecting these frameworks with drivers of genetics that underpin complex traits have had little success or impact on crop improvement. In further development of the generic APSIM Cereal model we have introduced aspects of physiological development at a more detailed level so that complex phenotypic responses become emergent properties of the model dynamics. At the same time, we intend to retain model simplicity by dealing with crop growth and development processes at a mostly similar level (organ-plant-canopy) to that used in conventional agronomic models. However, we argue that more biologically-grounded quantification of the underpinning processes will provide more robust avenues to link plant response to molecular genetics. There is some evidence for this from a range of studies on adaptation of crops to drought stress, where the generic APSIM cereal template has been employed. In this paper, we present an outline of the template framework and detail the approach to modelling nitrogen dynamics (uptake, allocation, retranslocation) in sorghum. This provides an example of how genetic variation linked to specific attributes of the plant (e.g. height) can generate emergent phenotypic differences in leaf area retention associated with nitrogen. We consider that the generic APSIM Cereal template provides a good framework to develop and enhance the functionality of whole-plant modelling required to help bridge the gene-to-phenotype gap.
Subjects E1
820404 Sorghum
070302 Agronomy
Keyword Plant model
genotype-to-phenotype
prediction
emergent properties
crop physiology
APSIM
Q-Index Code E1
Q-Index Status Confirmed Code

 
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Created: Thu, 16 Apr 2009, 15:23:05 EST by Emma Cushworth on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc