|Contributor||SARDI Minnipa Agricultural Centre|
Site 14, Minnipa Agricultural Centre, SA
Part 1: Medic cultivars were grown in soil with high boron levels in a glasshouse, leaf damage symptoms recorded and cultivars allocated to different tolerance groups (Howie 2012).
Part 2: The above identified that all spineless burr medic cultivars are susceptible to high boron levels. Screening wild accessions (supplied by the Australian Pasture Genebank) identified a burr medic accession with boron tolerance and vigorous growth. The boron tolerant accession was crossed with current spineless burr medic cultivars Scimitar and Cavalier. F2 plants with high early vigour were selected and a molecular marker used to identify homozygous boron tolerant plants. A single seed descent breeding method using speed breeding was used to obtain uniform lines. Lines were seed increased at Waite in 2018 and lines with the highest agronomic performance selected for 2019 field evaluation trials. A cohort of 16 boron tolerant lines along with their parents and barrel medic cultivars that differ in boron tolerance, were sown at Roseworthy and Minnipa. The trials were managed as best practice first year annual medics to maximise dry matter and seed production. Best practice consists of a high sowing rate (10 kg/ha), controlling broadleaf and grass weeds, monitoring and controlling insects and no grazing. Dry matter production was assessed and pods collected. Seed yield will be determined by April 2020.
|Lead research organisation||N/A|
|Host research organisation||N/A|
|Trial funding source||AWI RnD4Profit-16-03-101|
|Trial funding source||GRDC RnD4Profit-16-03-101|
|Trial funding source||MLA RnD4Profit-16-03-101|
|Trial funding source||Department of Agriculture RnD4Profit-16-03-101|
This project is supported by funding from the Australian Government Department of Agriculture as part of its Rural R&D for Profit
|Other trial partners||Not specified|
|Sow date||Not specified|
|Harvest date||Not specified|
|Plot size||5m x 1.5m|
|Plot randomisation||Random blocks|
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.