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Cereal Research Communications

, Volume 45, Issue 4, pp 655–664 | Cite as

Effect of Frost on Triticale and Wheat Varieties at Flowering in the North Eastern Australian Cereal Belt

  • S. TshewangEmail author
  • R. Jessop
  • C. Birchall
Breeding
  • 1 Downloads

Abstract

Spring radiation frost is a serious problem in Australia particularly at the reproductive stage, causing an annual revenue loss of more than AU$ 360 million. The focus of frost research therefore has been to identify reproductively frost resistant cereals at the both varietal and species levels that can contribute to alleviating frost damage. Seven triticale and three wheat varieties were assessed to determine relative frost tolerance under natural frost conditions. Plants were grown in pots and raised in the glasshouse. At flowering (±5 days), plants were exposed to a single overnight frost or frost maintained for a short time with varying intensities from 0.2 to −6.6 °C at crop ear height. The frost impact was assessed at maturity based on ear fertility by counting the number of developed grains. There were variable levels of tolerance between triticale varieties with Tahara being more susceptible than other varieties. At species level, triticale was more susceptible than wheat. Temperatures below −3.9 °C were economically damaging. A holistic approach of breeding and agronomic management may be needed to mitigate the frost problem in winter cereals.

Keywords

frost resistance fertility triticale 

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Notes

Acknowledgements

This work was carried out when Sangay Tshewang was on Endeavour Postgraduate Awards Scholarship funded by the Australian Government. Field expenses were supported by the Pork CRC. The authors thank Professor Robert A. Mclntosh, The University of Sydney, Australia for pre-reviewing the manuscript, and are grateful to the two anonymous reviewers for subsequently providing their critical comments.

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© Akadémiai Kiadó, Budapest 2017

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.School of Environmental and Rural ScienceUniversity of New EnglandArmidaleAustralia

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