Scientia Agricultura Sinica ›› 2012, Vol. 45 ›› Issue (14): 2793-2800.doi: 10.3864/j.issn.0578-1752.2012.14.002

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

QTLs Analysis of Wheat Seedling Traits under Salt Stress

 REN  Yong-Zhe, XU  Yan-Hua, GUI  Xiang-Wei, WANG  Su-Ping, DING  Jin-Ping, ZHANG  Qing-Chen, MA  Yuan-Song, PEI  Dong-Li   

  1. 1.商丘师范学院生命科学学院，河南商丘 476000
    2.河南省延津县农业局，河南延津 453200
  • Received:2012-02-17 Online:2012-07-15 Published:2012-04-19

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Abstract: 【Objective】The present study is aimed to identify QTLs associated with seedling traits under salt stress in common wheat (Triticum aestivum L.) and provide target loci and linked molecular markers for marker assisted selection of wheat salt tolerant-related traits.【Method】A hydroponic culture was carried out to evaluate wheat seedling traits (RDW, MRL, SDW, TDW) under control (CK) and salt stress (ST) conditions by using a recombinant inbred line (RIL) population derived from two Chinese wheat varieties Xiaoyan 54 and Jing 411. The relative values of each trait (ratio of ST/CK) were also calculated. 【Result】 A total of 25 QTLs for 4 traits were detected distributed on chromosomes 1A, 2A, 2D, 3A, 4A, 4B, 5B, 5D, 6B, 7A and 7B, and explained phenotypic variation ranging from 4.4% to 25.5%. Fifteen out of 25 QTLs detected in this research located on 5 genetic intervals in clusters on chromosomes 3A, 4A, 4B, 5B, and 5D and each of the other 10 loci located on different genetic intervals. A total of 5 major QTLs (explained phenotypic variation more than 10%) located on two major chromosome regions (Xgwm497.1-Xcfa2193 and Xbarc78-Xgwm350.1) on chromosomes 3A and 4A, respectively. 【Conclusion】 Most QTLs for wheat salt tolerance detected in present paper clustered on chromosomes 3A, 4A, 4B, 5B and 5D. Five major QTLs located on two chromosome regions (Xgwm497.1-Xcfa2193 and Xbarc78-Xgwm350.1) on chromosomes 3A and 4A, respectively. These chromosome regions may have a potential in the practice of marker assisted wheat breeding for improving salt-tolerance.

Key words: wheat (Triticum aestivum L.), QTL, salt stress, seedling stage

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