Influence of high daytime temperature during the grain filling stage on fissure formation in rice

Abayawickrama, A. S. M. T., Reinke, R. F., Fitzgerald, M. A., Harper, J. D. I. and Burrows, G. E. (2017) Influence of high daytime temperature during the grain filling stage on fissure formation in rice. Journal of Cereal Science, 74 256-262. doi:10.1016/j.jcs.2017.02.013

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Author Abayawickrama, A. S. M. T.
Reinke, R. F.
Fitzgerald, M. A.
Harper, J. D. I.
Burrows, G. E.
Title Influence of high daytime temperature during the grain filling stage on fissure formation in rice
Journal name Journal of Cereal Science   Check publisher's open access policy
ISSN 1095-9963
Publication date 2017-03-01
Sub-type Article (original research)
DOI 10.1016/j.jcs.2017.02.013
Open Access Status File (Author Post-print)
Volume 74
Start page 256
End page 262
Total pages 7
Place of publication London, United Kingdom
Publisher Academic Press
Language eng
Subject 1106 Food Science
1303 Biochemistry
Abstract High daytime temperatures during the grain filling stage in rice have negative impacts on milling quality traits. In this study, we used growth chambers to evaluate the influence of high daytime temperature (33 °C) during grain filling, together with grain moisture content at harvest (26%, 18% and 15%), on grain fissure formation. Varietal susceptibility to fissure formation was also evaluated by exposing grains to high temperature at different grain filling stages (milky, dough, maturing). Two fissure resistant varieties: Cypress (long-grain) and Reiziq (medium-grain) and susceptible varieties: YC53-00-7 (long-grain) and Baru (medium-grain) were compared. The average head rice yield (HRY) of Cypress declined from 62.7% at 25 °C to 53.5% at 33 °C, while Reiziq declined from 56.2% (25 °C) to 47.4% (33 °C). Both were significantly higher than the HRY of YC53-00-7 (39.2% and 24.9%) and Baru (39.3% and 31.7%) at 25 °C and 33 °C, respectively. When grains were drier at harvest (15% cf. 26%) there was a greater reduction in HRY. When the four varieties were exposed to high temperature, the highest average reduction of HRY was recorded at 21 days after heading. It is important to choose an optimal sowing date to avoid coincidence of the final grainfilling stage with high temperatures, in order to minimize milling quality losses.
Keyword Breakage
Oryza sativa
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
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