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Peer-reviewedCC BY 4.0G3: Genes, Genomes, Genetics

Evaluation of Trialling Efficiency of the Australian Wheatbelt

  • Vivi Arief1
  • Jip J C Ramakers2
  • Javier Fernandez1
  • Martin P Boer2
  • Carla Gho1
  • Fred A van Eeuwijk2
  • Scott Chapman1
  1. 1School of Agriculture and Food Sustainability, The University of Queensland , Brisbane, QLD, 4072 ,
  2. 2Wageningen University and Research , Wageningen, Gelderland 6708 PB ,
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Abstract

The Australian wheatbelt is divided into three main growing regions: the North (New South Wales and Queensland), the South (Victoria, South Australia and Tasmania), and the West (Western Australia). Using wheat yield data from the 2015–2022 multi-environmental trials (METs) conducted by the National Variety Trials (NVT), this study examines genotype-by-environment interactions (G×E) and trialling efficiencies, within and across regions. The North had the highest mean yield (390 gm-2) and the largest proportion of phenotypic variance explained by G×E (64%), while the West had the lowest yield (355 gm-2) and the lowest G×E contribution (44%). Despite regional differences, yield gains were approximately 1.4 gm-2 per year (or ∼ 0.5% annually) across all regions. The West also showed the highest repeatability (0.85 ± 0.02) and the lowest least significance difference (5% LSD, 22 gm-2 ± 1 gm-2) for a benchmark five-year MET, compared to the South (0.70 ± 0.04, 35 ± 1.4 gm-2) and the North (0.59 ± 0.05, 35 ± 1.4 gm-2). Modelling results were consistent across regions and indicated that 2 years of testing at 20 sites per year delivered efficiencies that could not be improved very much further.

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Cite

BibTeXRIS
BibTeX
@article{arief2026evaluation,
  title = {{Evaluation of Trialling Efficiency of the Australian Wheatbelt}},
  author = {Vivi Arief and Jip J C Ramakers and Javier Fernandez and Martin P Boer and Carla Gho and Fred A van Eeuwijk and Scott Chapman},
  journal = {G3: Genes, Genomes, Genetics},
  year = {2026},
  month = oct,
  doi = {10.1093/g3journal/jkag286},
  url = {https://academic.oup.com/g3journal/advance-article/doi/10.1093/g3journal/jkag286/9001777},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Evaluation of Trialling Efficiency of the Australian Wheatbelt
AU  - Vivi Arief
AU  - Jip J C Ramakers
AU  - Javier Fernandez
AU  - Martin P Boer
AU  - Carla Gho
AU  - Fred A van Eeuwijk
AU  - Scott Chapman
PY  - 2026
DA  - 2026/10/26
JO  - G3: Genes, Genomes, Genetics
DO  - 10.1093/g3journal/jkag286
UR  - https://academic.oup.com/g3journal/advance-article/doi/10.1093/g3journal/jkag286/9001777
AB  - The Australian wheatbelt is divided into three main growing regions: the North (New South Wales and Queensland), the South (Victoria, South Australia and Tasmania), and the West (Western Australia). Using wheat yield data from the 2015–2022 multi-environmental trials (METs) conducted by the National Variety Trials (NVT), this study examines genotype-by-environment interactions (G×E) and trialling efficiencies, within and across regions. The North had the highest mean yield (390 gm-2) and the largest proportion of phenotypic variance explained by G×E (64%), while the West had the lowest yield (355 gm-2) and the lowest G×E contribution (44%). Despite regional differences, yield gains were approximately 1.4 gm-2 per year (or ∼ 0.5% annually) across all regions. The West also showed the highest repeatability (0.85 ± 0.02) and the lowest least significance difference (5% LSD, 22 gm-2 ± 1 gm-2) for a benchmark five-year MET, compared to the South (0.70 ± 0.04, 35 ± 1.4 gm-2) and the North (0.59 ± 0.05, 35 ± 1.4 gm-2). Modelling results were consistent across regions and indicated that 2 years of testing at 20 sites per year delivered efficiencies that could not be improved very much further.
SN  - 2160-1836
ER  -