Acta Agriculturae Boreali-Sinica ›› 2022, Vol. 37 ›› Issue (6): 124-131. doi: 10.7668/hbnxb.20193137

Special Issue: Oil crops

• Crop Genetics & Breeding·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Identification of QTL for Aluminum Tolerance Related Traits at the Early Seedling Stage in Sesame

LIANG Junchao1,2,3, ZHAO Yunyan1,4, WANG Zhiqi1,4, SUN Jian1,2,3, YAN Tingxian1,2,3, YAN Xiaowen1,2,3, RAO Yueliang1,2,3, ZHOU Hongying1,2,3, LE Meiwang1,2,3,   

  1. 1 Crops Research Institute,Jiangxi Academy of Agricultural Sciences,Nanchang 330200,China
    2 Nanchang Branch of National Center of Oil Crops Improvement,Nanchang 330200,China
    3 Jiangxi Province Key Laboratory of Oil Crops Biology,Nanchang 330200,China
    4 College of Agriculture,Yangtze University,Jingzhou 330033,China
  • Received:2022-08-06 Published:2022-12-28

Abstract:

To elucidate the genetic mechanism and identify quantitative trait loci(QTL)for Aluminum(Al)tolerance in sesame.We investigated the response of Al stress using sesame landraces Jinhuangma(JHM)and Zhushanbai(ZSB)with different concentrations of Al3+ and confirmed a suitable Al3+ concentration for stress.Three traits including relative root length(RRL),relative shoot length(RSL)and relative fresh seedling weight(RSW)were evaluated in a recombinant inbred line(RIL)population with 180 lines that derived from two parents that contrasts for Al tolerance(ZSB and JHM).Quantitative trait loci(QTL)mapping were conducted by using a high resolution genetic map containing 1 354 bin markers through composition interval mapping(CIM)method.Significant positive correlations were observed among the three traits.A total of 7 QTLs were detected on 6 chromosomes(Chr2,Chr4,Chr6,Chr10,Chr11 and Chr13),including 3 RRL related QTLs,2 RSL related QTLs and 2 RSW associated QTLs.Among them,two QTLs associated with RRL and RSW were mapped to the overlapped interval on chromosome 2.Putative candidate gene analysis revealed that 15 genes may be related to Al tolerance.These genes mainly involved in metal transport and detoxification,transmembrane binding of metal ions,GDSL-motif lipase,peroxisomal catalase and metabolism and detoxification of toxic substances in organisms.

Key words: Sesame, Al stress, QTL mapping, Candidate gene

Cite this article

LIANG Junchao, ZHAO Yunyan, WANG Zhiqi, SUN Jian, YAN Tingxian, YAN Xiaowen, RAO Yueliang, ZHOU Hongying, LE Meiwang. Identification of QTL for Aluminum Tolerance Related Traits at the Early Seedling Stage in Sesame[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(6): 124-131. doi: 10.7668/hbnxb.20193137.

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