Researcher(s) |
Therese McBeath Rhaquelle Meiklejohn Greg Rebetzke Andrew Ware |
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Year(s) | 2021 |
Contributor | Agricultural Innovation & Research Eyre Peninsula |
Trial location(s) |
Site D, Cootra, SA, SA
|
Further information | View external link |
The trials reported here assessed the performance of long coleoptile wheats in an Eyre Peninsula farming system.
• Longer coleoptile wheat varieties provide opportunities and flexibility to successfully establish crops in situations where previously not possible.
• The coleoptile provides protection to the emerging shoot. Longer coleoptiles allow wheat to successfully emerge from deeper sowing.
• 2021 trials conducted on sandy soils at Cootra found that both a Mace and a version of Mace with a long coleoptile gene emerged equally well from a sowing depth of 10 cm.
• The long coleoptile genetics did not show any yield penalty when sown at 10 cm.
• Four newly released commercial varieties with longer coleoptiles were all able to establish well from a depth of 10 cm.
Lead research organisation |
EPAG Research Trust |
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Host research organisation |
Agricultural Innovation & Research Eyre Peninsula |
Trial funding source | South Australian Grains Industry Trust (SAGIT) EP120 |
Related program | N/A |
Acknowledgments |
Rhaquelle was funded by SAGIT/AIR EP as part of the Eyre Peninsula internship in applied grains research project, project code EP120. CSIRO for providing the long coleoptile germplasm. AGT, LongReach and lnterGrain for proving seed of the newly released varieties. This work was also made possible through the National Landcare Program's Resilient EP project. Todd Matthews and family for providing the trial site. Gary Miller, Mark Saunders, Ashley Flint and Jacob Giles of EPAG Research for their assistance. |
Other trial partners | CSIRO Agriculture and Food |
Crop type | Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | Experimental |
Trial design | Randomised,Blocked |
Sow rate or Target density | 160 plants/m2 |
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Sow date | 7 May 2021 7 May 2021 |
Harvest date | 1 December 2021 1 December 2021 |
Trial design method | RCBD Randomised Complete Block Design |
Plot size | Not specified |
Plot replication | 3 |
Psuedoreplication | N |
Plot blocking | Randomised complete block |
Plot randomisation | Y |
Fertiliser |
Seeding 16kg/ha phosphorus 14kg/ha Nitrogen Post emergence 106kg/ha Nitrogen Foliar Application 120gm/ha Zinc 150gm/ha Manganese 45gm/ha Copper @ late tillering
|
Herbicide |
Weed control was achieved through the application of 118 g/ha of Sakura®, and 1.6 L/ha of Avadex Xtra® applied prior to seeding and 25 g/ha of Paradigm®, 300 ml/ha of LVE MCPA, 500 ml/1 00L of Uptake®, applied post-emergent |
Insecticide |
70 ml/ha of Alpha Scud®, |
Fungicide |
300 ml/ha of Prosaro®, 600 ml/ha of Aviator® |
Other trial notes |
Background: Improving the reliability of early establishment plays an important role in increasing water use efficiency and yield potential in dryland cropping environments. Establishing plants earlier extends the growing period of a crop, and when combined with optimal phenology, provides more time for a plant to develop resources that ultimately contribute to grain fill and yield. Seeding deeper, into soil moisture present below the 'normal seeding bed' may help to establish plants earlier without relying on an autumn break for germination. Currently, wheat growers are restricted to a seeding depth of 3-5 cm because modern wheat varieties have a shortened coleoptile associated with dwarfing genes that were introduced in the 1960's to increase yields. The length of a coleoptile restricts seeding depth because it is a hollow shoot that protects the first leaves as they grow towards the soil surface during germination. Breeders have now identified an alternate dwarfing gene 'Rht18' that allows a coleoptile up to 12 cm long, whilst maintaining the reduced height associated with modern high yielding wheat varieties. |
Rainfall avg ann (mm) | 340mm |
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Rainfall avg gsr (mm) | 241mm |
Rainfall trial total (mm) | 413mm |
Rainfall trial gsr (mm) | 268mm |
SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.