Xu, R and Wang, J and Li, C and Johnson, P and Lu, C and Zhou, M, A single locus is responsible for salinity tolerance in a Chinese landrace barley (Hordeum vulgare L.), PLoS One, 7, (8) Article e43079. ISSN 1932-6203 (2012) [Refereed Article]
Licenced under Creative Commons Attribution 2.5 Generic (CC BY 2.5) http://creativecommons.org/licenses/by/2.5/
Introduction: Salinity and waterlogging are two major abiotic stresses severely limiting barley production. The lack of a reliable screening method makes it very hard to improve the tolerance through breeding programs.
Methods: This work used 188 DH lines from a cross between a Chinese landrace variety, TX9425 (waterlogging and salinity tolerant), and a Japanese malting barley, Naso Nijo (waterlogging and salinity sensitive), to identify QTLs associated with the tolerance.
Results: Four QTLs were found for waterlogging tolerance. The salinity tolerance was evaluated with both a hydroponic system and in potting mixture. In the trial with potting mixture, only one major QTL was identified to associate with salinity tolerance. This QTL explained nearly 50% of the phenotypic variation, which makes it possible for further fine mapping and cloning of the gene. This QTL was also identified in the hydroponic experiment for different salt-related traits. The position of this QTL was located at a similar position to one of the major QTLs for waterlogging tolerance, indicating the possibility of similar mechanisms controlling both waterlogging and salinity tolerance.
Conclusion: The markers associated with the QTL provided a unique opportunity in breeding programs for selection of salinity and waterlogging tolerance.
|Item Type:||Refereed Article|
|Research Division:||Agricultural and Veterinary Sciences|
|Research Group:||Crop and Pasture Production|
|Research Field:||Crop and Pasture Improvement (Selection and Breeding)|
|Objective Division:||Plant Production and Plant Primary Products|
|Objective Group:||Winter Grains and Oilseeds|
|Author:||Johnson, P (Dr Peter Johnson)|
|Author:||Zhou, M (Professor Meixue Zhou)|
|Web of Science® Times Cited:||20|
|Deposited By:||Agricultural Science|
|Downloads:||256 View Download Statistics|
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