2025-4-23- 15
Home > Archive>Volume 26, Issue 4, 2025 >808-816. DOI:10.13430/j.cnki.jpgr.20240907001
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Genetic Analysis and QTL Mapping of Resistance Genes for Peanut Web Blotch
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Affiliation:

1.College of Plant Protection， Shanxi Agricultural University， Taiyuan 030031;2.Institute of Industrial Crops， Shanxi Agricultural University， Taiyuan 030031;3.College of Agronomy， Shanxi Agricultural University， Taigu 030801

Fund Project:

Foundation projects： The Fundamental Research Program of Shanxi Province （202203021221178）； The Science and Technology Major Project of Shanxi Province （202201140601025）； The National Peanut Industry Technology System Construction（CARS-13）； Biological Breeding Projects of Shanxi Agricultural University （YZGC049）； The Earnarked Fund for Modern Agro-industry Technology Research System of Shanxi Province（2024CYJSTX05）

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    Abstract:

    Peanut web blotch， a fungal disease affecting the leaves of peanut plants， can substantially impact both yield and quality. Genetic analysis and QTL mapping of resistance genes against this disease are crucial for identifying resistant germplasm resources and advancing peanut breeding. This study employed a recombinant inbred line（RIL） population consisting of 807 individuals derived from the cross between 'Huayu 44' and 'DF12' to dissect the genetic basis through QTL mapping for resistance. The analysis showed that the resistance mechanism followed the MX1-A-AI inheritance model， characterized by a combination of one major additive gene and multiple minor-effect genes and epistatic interactions. The major gene exhibited substantial heritability across three environmental conditions （63.44%， 60.70% and 74.64%， respectively）. Through QTL mapping， we identified five QTLs， qDIA02.1， qDIA02.2， qDIB07， qDIB08， and qDIB09， distributed across four linkage groups， explaining 4.68%-15.91% of the phenotypic variation. Three QTLs， qDIA02.1， qDIB07， and qDIB09， were repeatedly detected across three environments， explaining 5.15%-9.43%， 7.62%-15.91%， and 5.24%-6.16% of phenotypic variation， respectively. qDIB07 was identified as a potential major QTL， indicating that peanut web blotch resistance is predominantly regulated by major genes. These findings provide a basis for future precisely localizing resistance genes to peanut web blotch and developing disease-resistant peanut varieties.

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History
  • Received:September 07,2024
  • Online: April 03,2025
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