The relationship between the stay-green trait and grain yield in elite sorghum hybrids grown in a range of environments

Jordan, D. R., Hunt, C. H., Cruickshank, A.W., Borrell, A. K. and Henzell, R. G. (2012) The relationship between the stay-green trait and grain yield in elite sorghum hybrids grown in a range of environments. Crop Science, 52 3: 1153-1161. doi:10.2135/cropsci2011.06.0326


Author Jordan, D. R.
Hunt, C. H.
Cruickshank, A.W.
Borrell, A. K.
Henzell, R. G.
Title The relationship between the stay-green trait and grain yield in elite sorghum hybrids grown in a range of environments
Journal name Crop Science   Check publisher's open access policy
ISSN 0011-183X
1435-0653
Publication date 2012-05-01
Sub-type Article (original research)
DOI 10.2135/cropsci2011.06.0326
Volume 52
Issue 3
Start page 1153
End page 1161
Total pages 9
Place of publication Madison, WI, United States
Publisher Crop Science Society of America
Language eng
Formatted abstract
The stay-green drought adaptation mechanism has been widely promoted as a way of improving grain yield and lodging resistance in sorghum [Sorghum bicolor (L.) Moench] and as a result has been the subject of many physiological and genetic studies. The relevance of these studies to elite sorghum hybrids is not clear given that they sample a limited number of environments and were conducted using inbred lines or relatively small numbers of experimental F 1 hybrids. In this study we investigated the relationship between stay-green and yield using data from breeding trials that sampled 1668 unique hybrid combinations and 23 environments whose mean yields varied from 2.3 to 10.5 t ha -1. The strength and direction of the association between stay-green and grain yield varied with both environment and genetic background (male tester). The majority of associations were positive, particularly in environments with yields below 6 t ha -1. As trial mean yield increased above 6 t ha -1 there was a trend toward an increased number of negative associations; however, the number and magnitude of the positive associations were larger. Given that post-flowering drought is very commonly experienced by sorghum crops world wide and average yields are 1.2 and 2.5 t ha -1 for the world and Australia, respectively, our results indicate that selection for staygreen in elite sorghum hybrids may be broadly beneficial for increasing yield in a wide range of environments.
Keyword Bicolor L. moench
Drought resistance
Improve yield
Leaf-area
Senescence
Components
Variety
Stress
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2013 Collection
 
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