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A reduced-tillering trait shows small but important yield gains in dryland wheat production.
Houshmandfar, Alireza; Ota, Noboru; O'Leary, Garry J; Zheng, Bangyou; Chen, Yang; Tausz-Posch, Sabine; Fitzgerald, Glenn J; Richards, Richard; Rebetzke, Greg J; Tausz, Michael.
Afiliação
  • Houshmandfar A; CSIRO Agriculture and Food, Centre for Environment and Life Sciences, Floreat, WA, Australia.
  • Ota N; Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Creswick, Vic., Australia.
  • O'Leary GJ; CSIRO Health and Biosecurity, Canberra, ACT, Australia.
  • Zheng B; Agriculture Victoria, Horsham, Vic., Australia.
  • Chen Y; School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Vic., Australia.
  • Tausz-Posch S; CSIRO Agriculture and Food, Queensland Bioscience Precinct, St. Lucia, Qld, Australia.
  • Fitzgerald GJ; Goods Shed North, CSIRO Data61, Docklands, Vic., Australia.
  • Richards R; Department of Agriculture, Science and the Environment, School of Health, Medical and Applied Science, CQUniversity Australia, Rockhampton, Qld, Australia.
  • Rebetzke GJ; Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Creswick, Vic., Australia.
  • Tausz M; Agriculture Victoria, Horsham, Vic., Australia.
Glob Chang Biol ; 26(7): 4056-4067, 2020 07.
Article em En | MEDLINE | ID: mdl-32237246
Reducing the number of tillers per plant using a tiller inhibition (tin) gene has been considered as an important trait for wheat production in dryland environments. We used a spatial analysis approach with a daily time-step coupled radiation and transpiration efficiency model to simulate the impact of the reduced-tillering trait on wheat yield under different climate change scenarios across Australia's arable land. Our results show a small but consistent yield advantage of the reduced-tillering trait in the most water-limited environments both under current and likely future conditions. Our climate scenarios show that whilst elevated [CO2 ] (e[CO2 ]) alone might limit the area where the reduced-tillering trait is advantageous, the most likely climate scenario of e[CO2 ] combined with increased temperature and reduced rainfall consistently increased the area where restricted tillering has an advantage. Whilst long-term average yield advantages were small (ranged from 31 to 51 kg ha-1  year-1 ), across large dryland areas the value is large (potential cost-benefits ranged from Australian dollar 23 to 60 MIL/year). It seems therefore worthwhile to further explore this reduced-tillering trait in relation to a range of different environments and climates, because its benefits are likely to grow in future dry environments where wheat is grown around the world.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Triticum / Mudança Climática País/Região como assunto: Oceania Idioma: En Ano de publicação: 2020 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Triticum / Mudança Climática País/Região como assunto: Oceania Idioma: En Ano de publicação: 2020 Tipo de documento: Article