A Single Locus Is Responsible for Salinity Tolerance in a Chinese Landrace Barley (Hordeum vulgare L.)
文献类型： 外文期刊
作者： Xu, Rugen 1 ; Wang, Junmei 3 ; Li, Chengdao 4 ; Johnson, Peter 5 ; Lu, Chao 1 ; Zhou, Meixue 5 ;
作者机构： 1.Yangzhou Univ, Jiangsu Prov Key Lab Crop Genet & Physiol, Yangzhou, Peoples R China
2.Yangzhou Univ, Barley Res Inst, Yangzhou, Peoples R China
3.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou, Zhejiang, Peoples R China
4.Govt Western Australia, Dept Agr & Food, S Perth, WA, Australia
5.Univ Tasmania, Tasmanian Inst Agr, Kings Meadows, Tas, Australia
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2012 年 7 卷 8 期
页码：
收录情况： SCI
摘要： 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.
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