Increasing heat tolerance in wheat in West Australia

Chenu, Karine, Collins, Brian, Ullah, Najeeb, and Christopher, Jack (2021) Increasing heat tolerance in wheat in West Australia. In: GRDC Update Papers. From: 2021 Grains Research Update, 22-23 February 2021, Perth, WA, Australia.

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In recent decades, rising temperatures have increasingly affected wheat crops in major producing regions around the world. Climate models predict further increases in mean temperature and in the frequency of temperature extremes for the near to mid-future, (e.g. Zheng et al 2012; IPCC 2014; Collins and Chenu 2021).

Heat stress can affect wheat crops at each stage of the crop cycle, (e.g. Farooq et al 2011; Hunt et al 2018). However, heat events mostly impact grain yield of an established crop when they occur (i) pre-anthesis and affect grain number, (e.g. Ugarte et al 2007; Chenu and Oudin 2019) or (ii) during grain filling and reduce the size of individual grains, (e.g. Tashiro and Wardlaw 1990; Ullah and Chenu 2019). Overall, the impact of heat stress depends on the timing, severity and duration of heat events, as well as genotypic characteristics, (e.g. Prasad et al 2014).

The first part of this paper presents results from a modelling study on how heat shocks have impacted wheat crops in Western Australia in recent times, how temperatures have increased since 1985, and the consequence of this on wheat crops. Details of this part have been recently published in Ababaei and Chenu (2020). The second part of the paper describes a new field-based method to screen reliably for heat tolerance and assist crop improvement.

Item ID: 70764
Item Type: Conference Item (Presentation)
Date Deposited: 01 Jun 2022 03:12
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3004 Crop and pasture production > 300404 Crop and pasture biochemistry and physiology @ 50%
41 ENVIRONMENTAL SCIENCES > 4101 Climate change impacts and adaptation > 410199 Climate change impacts and adaptation not elsewhere classified @ 50%
SEO Codes: 19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1904 Natural hazards > 190401 Climatological hazards (e.g. extreme temperatures, drought and wildfires) @ 100%
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