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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (05): 748-753.doi: 10.3724/SP.J.1006.2008.00748

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

Inheritance and QTL Analysis of Submergence Tolerance at Seedling Stage in Soybean [Glycine max (L.) Merr.]

WANG Fang1,ZHAO Tuan-Jie1,YU De-Yue1,CHEN Shou-Yi2,GAI Jun-Yi1*   

  1. 1 Soybean Research Institute, Nanjing Agricultural University / National Center for Soybean Improvement / National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing 210095, Jiangsu; 2 Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
  • Received:2007-08-06 Revised:1900-01-01 Online:2008-05-12 Published:2008-05-12
  • Contact: GAI Jun-Yi

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Abstract: Flooding is often a serious natural disaster in the world. Flooding tolerance has been recognized in two categories: tolerance to soil waterlogging and tolerance to submergence. The objective of the present study was to reveal the inheritance and then to map the QTLs of tolerance to submergence in soybean. The survival percentage of seedlings of the RIL population NJRIKY derived from Kefeng No.1 (highly tolerant) × Nannong 1138-2 (sensitive) was evaluated under completely submerged condition in a pot experiment. The results from segregation analysis under major gene plus polygene mixed inheritance model showed that submergence tolerance of soybean was dominated by three major genes with the heritability of 42.40% and no polygene detected. With composite interval mapping (CIM) and multiple interval mapping (MIM) under Win QTL Cartographer Version 2.5, three QTLs associated with submergence tolerance were identified, which located in Satt648-K418_2V, Satt531-A941V and Satt038-Satt275 (B53B-Satt038) on linkage groups A1, D1a and G, respectively, explaining 4.4-7.6% of the total phenotypic variation. The results from segregation analysis and QTL mapping appeared relatively consistent and could be verified each other.

Key words: Soybean [Glycine max (L.) Merr.], Submergence tolerance, Recombinant inbred line (RIL), Segregation analysis, QTL mapping

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