Expression of genotypic responses to frost tolerance in wheat

Gunawardena, T. A., Bodapati, P.N. and Fukai, S. (2004). Expression of genotypic responses to frost tolerance in wheat. In: T. Fischer, New Directions for a Diverse Planet: Proceedings for the 4th International Crop Science Congress. 4th International Crop Science Congress, Brisbane, Convention Centre, (1-7). 26 September - 1 October 2004.


Author Gunawardena, T. A.
Bodapati, P.N.
Fukai, S.
Title of paper Expression of genotypic responses to frost tolerance in wheat
Conference name 4th International Crop Science Congress
Conference location Brisbane, Convention Centre
Conference dates 26 September - 1 October 2004
Proceedings title New Directions for a Diverse Planet: Proceedings for the 4th International Crop Science Congress
Place of Publication Gosford
Publisher The Regional Institute Ltd
Publication Year 2004
Sub-type Fully published paper
ISBN 1 920842 21 7
Editor T. Fischer
Start page 1
End page 7
Total pages 7
Collection year 2004
Abstract/Summary Yield losses due to frost in Australian wheat crop can be high and are often associated with head-frosting. Two field experiments were conducted over two seasons to investigate the genetic variation in frost tolerance in 150 double haploid lines (DHLs) derived from a cross between Kite and Bindawarra. Glycinebetaine content in the leaf blade during frost acclimation/hardening, cell membrane damage (electrolyte leakage) after frost and grain yield were measured. Significant variation in cell membrane damage was noted (16% to 85%) which was negatively correlated with grain yield (r = - 0.43; p<0.001), indicating genetic variation in frost tolerance among DHLs. Frost acclimation in the first season resulted in large variation in glycinebetaine content (20 to 90 μ mol/g dwt) in the leaf blade which significantly explained the variation in grain yield. It was concluded that genetic variation in frost tolerance among 150 DHLs exists and the results from two seasons showed that the frost acclimation is vital phenomenon in enhancing and expressing genetic variation in frost tolerance.
Subjects E1
300201 Plant Biochemistry and Physiology
620101 Wheat
Q-Index Code E1

 
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Created: Thu, 23 Aug 2007, 20:06:31 EST