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3D modelling of tillering behaviour and light interception of freely (-tin) and restricted (+tin) tillering wheat near-isolines
Citation
Moeller, C and Evers, JB and Rebetzke, GJ, 3D modelling of tillering behaviour and light interception of freely (-tin) and restricted (+tin) tillering wheat near-isolines, Proceedings of the17th Australian Society of Agronomy Conference, 20-24 September 2015, Hobart, Australia, pp. 1-4. (2015) [Refereed Conference Paper]
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Copyright Statement
Copyright 2015 the author
Official URL: http://www.agronomyaustralia.org/
Abstract
A functional-structural plant model of wheat architecture was parameterised to simulate a pair of lines
varying for a tiller inhibition (tin) gene. Effects of planting configuration were explored through red : far-red
(R:FR) signalling on tiller production, final spike numbers, and light interception. Both increased plant
density (125 to 200 plants/m2) and row spacing (20 to 30 cm) reduced the simulated tiller and spike numbers
per plant in both lines. This reduction was greater in the free-tillering (–tin) than in the reduced-tillering
(+tin) line. At wider row spacing of 30 cm, simulated radiation interception was less in the +tin line than in
the –tin line from about 60 days after sowing onwards. In the +tin line, increased R:FR signalling between
individual plants due to less within-row spacing at wider rows resulted in reduced spikes/m2 irrespective of
population density. Spikes/m2 simulated for the –tin line were similar at either row spacing in a population of
125 plants/m2, but decreased with wider row spacing at the higher density of 200 plants/m2. For both lines,
the greatest number of tillers and ultimately spikes per m2 was simulated at a density of 200 plants/m2 and 20
cm row spacing (–tin: 820 spikes/m2; +tin: 570 spikes/m2). The simulations indicated that growing +tin
wheat at an increased density of 200 plants/m2 and 20 cm row spacing can produce similar, or greater,
spikes/m2 compared to –tin wheat grown at a density of 125 plants/m2.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | Functional Structural Plant Model, wheat, tillering, canopy architecture, plant density, row spacing |
| Research Division: | Agricultural and Veterinary Sciences |
| Research Group: | Crop and Pasture Production |
| Research Field: | Crop and Pasture Biochemistry and Physiology |
| Objective Division: | Plant Production and Plant Primary Products |
| Objective Group: | Winter Grains and Oilseeds |
| Objective Field: | Wheat |
| UTAS Author: | Moeller, C (Dr Carina Moeller) |
| ID Code: | 102996 |
| Year Published: | 2015 |
| Deposited By: | Tasmanian Institute of Agriculture |
| Deposited On: | 2015-09-15 |
| Last Modified: | 2016-05-09 |
| Downloads: | 185 View Download Statistics |
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