Sorghum dwarfing genes can affect radiation capture and radiation use efficiency

George-Jaeggli, B., Jordan, D. R., van Oosterom, E. J., Broad, I. J. and Hammer, G. L. (2013) Sorghum dwarfing genes can affect radiation capture and radiation use efficiency. Field Crops Research, 149 283-290. doi:10.1016/j.fcr.2013.05.005

Author George-Jaeggli, B.
Jordan, D. R.
van Oosterom, E. J.
Broad, I. J.
Hammer, G. L.
Title Sorghum dwarfing genes can affect radiation capture and radiation use efficiency
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
Publication date 2013-08-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.fcr.2013.05.005
Volume 149
Start page 283
End page 290
Total pages 8
Place of publication Amsterdam Netherlands
Publisher Elsevier BV
Language eng
Formatted abstract
Presence of the dw3 sorghum dwarfing gene had negative effects on grain yield in some genetic backgrounds and environments. In a previous study we showed that this was due to a significant reduction in shoot biomass (mainly via reduced stem mass), which in turn negatively affected grain size. The current study examines whether shoot biomass was reduced via effects of dw3 on traits associated with resource capture, such as leaf area index (LAI), light interception (LI), and canopy extinction coefficient (k) or with resource use efficiency, such as radiation use efficiency (RUE). Three pairs of near-isogenic sorghum lines differing only in the presence or absence of the dwarfing allele dw3 (3-dwarfs vs 2-dwarfs) were grown in large field plots. Biomass accumulation and LI were measured for individual canopy layers to examine canopy characteristics of tall and short types. Similar to the previously reported effects on grain yield, the effects of dw3 on RUE, LI and k varied among genetic backgrounds and environments. Interactions between dw3 and genetic background, but also interactions with environment are likely to have modulated the extent to which RUE, LI, or k contributed to biomass differences between tall and short sorghum.
Keyword Light interception
Plant height
Radiation use efficiency
Sorghum bicolor
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Queensland Alliance for Agriculture and Food Innovation
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 8 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 8 times in Scopus Article | Citations
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Created: Sun, 15 Sep 2013, 10:14:29 EST by System User on behalf of Qld Alliance for Agriculture and Food Innovation