The potential contribution of wild barley (Hordeum vulgare ssp spontaneum) germplasm to drought tolerance of cultivated barley (H. vulgare ssp vulgare)

Lakew, B., Eglinton, J., Henry, R. J., Baum, M., Grando, S. and Ceccarelli, S. (2011) The potential contribution of wild barley (Hordeum vulgare ssp spontaneum) germplasm to drought tolerance of cultivated barley (H. vulgare ssp vulgare). Field Crops Research, 120 1: 161-168. doi:10.1016/j.fcr.2010.09.011

Author Lakew, B.
Eglinton, J.
Henry, R. J.
Baum, M.
Grando, S.
Ceccarelli, S.
Title The potential contribution of wild barley (Hordeum vulgare ssp spontaneum) germplasm to drought tolerance of cultivated barley (H. vulgare ssp vulgare)
Formatted title
The potential contribution of wild barley (Hordeum vulgare ssp. spontaneum) germplasm to drought tolerance of cultivated barley (H. vulgare ssp. vulgare)
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
Publication date 2011-01
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.fcr.2010.09.011
Volume 120
Issue 1
Start page 161
End page 168
Total pages 8
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
Improving drought tolerance has always been an important objective in many crop improvement programs and is becoming more important as one way of adapting crops to climate changes. However, due to its complexity, the genetic mechanisms underlying the expression of drought tolerance in plants are poorly understood and this trait is difficult to characterize and quantify. This study assessed the importance of the wild progenitor of cultivated barley, Hordeum spontaneum C. Koch, in contributing
developmental and yield-related traits associated with drought tolerance and therefore its usefulness in breeding for improved adaptation to drought stress conditions. Fifty-seven fixed barley lines derived from crosses with two H. spontaneum lines (41-1 and 41-5) were evaluated in Mediterranean low rainfall environments with 10 improved varieties and three landraces for grain yield, developmental and agronomic traits. The study was conducted for three years (2004–2006) in a total of nine environments (location–year combinations), eight in Syria and one in Jordan, which were eventually reduced to seven due to a large error variance in two of them. There was significant genetic variation among the genotypes for most of the traits measured, as well as differential responses of genotypes across environments.
Traits such as peduncle length, peduncle extrusion and plant height were positively correlated with grain yield in the dry environments. Differences in phenology were small and not significantly correlated with differences in grain yield under stress. Performances at the three highest yielding environments were much more closely correlated than those at the four stress environments. The GGE biplot analysis allowed identification of genotypes consistently best adapted to the lowest yielding environments and confirmed the existence of unique environments for identifying better adapted genotypes in the low rainfall environments of Syria. The top yielding lines in the driest of the seven environments derived mostly from crosses with H. spontaneum 41-1, while most of the improved varieties showed a positive genotype by environment (GE) interaction with the highest yielding environments. The results of the field experiments indicated that there was variation for grain yield under drought stress among barley genotypes, and that some of the lines derived from H. spontaneum had consistently superior specific adaptation to the range of severe stress conditions used in this study. The usefulness of H. spontaneum in breeding programs for stress conditions is likely to increase in view of the predicted increase in the occurrence of high temperatures and droughts.
Keyword Drought
Wild relatives
Climate changes
Specific adaptation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 15 October 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Queensland Alliance for Agriculture and Food Innovation
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Citation counts: TR Web of Science Citation Count  Cited 15 times in Thomson Reuters Web of Science Article | Citations
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