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ORIGINAL RESEARCH article

Front. Plant Sci.
Sec. Plant Pathogen Interactions
Volume 15 - 2024 | doi: 10.3389/fpls.2024.1446062
This article is part of the Research Topic Current Advances in Fusarium Wilt View all 13 articles

High-density genetic map construction and QTL mapping to identify genes for blight defense-and yield-related traits in sesame (Sesamum indicum L.)

Provisionally accepted
Guizhen Xu Guizhen Xu 1Yanqin Cui Yanqin Cui 1*Sida Li Sida Li 1*Zhongbo Guan Zhongbo Guan 1*Hong-mei Miao Hong-mei Miao 2Yuanzhang Guo Yuanzhang Guo 1*
  • 1 Hebei Academy of Agriculture and Forestry Sciences (HAAFS), Shijiazhuang, China
  • 2 Henan Academy of Agricultural Sciences (HNAAS), Zhengzhou, Henan Province, China

The final, formatted version of the article will be published soon.

    Sesame (Sesamum indicum L.) is an important oilseed crop widely cultivated in subtropical and tropical areas. Low genetic yield potential and susceptibility to disease contribute to low productivity in sesame. However, the genetic basis of sesame yield-and disease-related traits remains unclear. Here, we represent the construction of a high-density bin map of sesame using whole genome sequencing of an F2 population derived from 'Yizhi' and 'Mingdeng Zhima'. A total of 2766 Bins were categorized into 13 linkage groups. Thirteen significant QTLs were identified, including ten QTLs related to yield, two QTLs related to Sesame Fusarium wilt (SFW) disease, and one QTL related to seed color. Among these QTLs, we found that SFW-QTL1.1 and SFW-QTL1.2 were major QTLs related to Fusarium wilt disease, explaining more than 20% of the phenotypic variation with LOD > 6. SCC-QTL1.1 was related to seed coat color, explaining 52% of the phenotypic variation with LOD equal to 25.3. This suggests that seed color traits were controlled by a major QTL.Candidate genes related to Fusarium wilt disease and seed color in the QTLs were annotated. We discovered a significant enrichment of genes associated with resistance to late blight. These genes could be spectral disease resistance genes and may have a role in the regulation of Fusarium wilt disease resistance. Our study will benefit the implementation of marker-assisted selection (MAS) for the genetic improvement of disease resistance and yield-related traits in sesame.

    Keywords: Sesamum indicum L, Genetic map, QTL mapping, Fusarium Wilt, yield-related traits.

    Received: 08 Jun 2024; Accepted: 05 Sep 2024.

    Copyright: © 2024 Xu, Cui, Li, Guan, Miao and Guo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Yanqin Cui, Hebei Academy of Agriculture and Forestry Sciences (HAAFS), Shijiazhuang, China
    Sida Li, Hebei Academy of Agriculture and Forestry Sciences (HAAFS), Shijiazhuang, China
    Zhongbo Guan, Hebei Academy of Agriculture and Forestry Sciences (HAAFS), Shijiazhuang, China
    Yuanzhang Guo, Hebei Academy of Agriculture and Forestry Sciences (HAAFS), Shijiazhuang, China

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