Marker-assisted backcrossing to improve seed oleic acid content in four elite and popular peanut (Arachis hypogaea L.) cultivars with high oil content

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  • Huang Bingyan
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Qi Feiyan
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Sun Ziqi
    Henan Provincial Key Laboratory for Oil Crops Improvement
  • Miao Lijuan
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Zhang Zhongxin
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Liu Hua
    Henan Provincial Key Laboratory for Oil Crops Improvement
  • Fang Yuanjin
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Dong Wenzhao
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Tang Fengshou
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Zheng Zheng
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences
  • Zhang Xinyou
    Key Laboratory of Oil Crops in Huanghuaihai Plains, Industrial Crops Research Institute, Henan Academy of Agricultural Sciences

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  • Marker-assisted backcrossing to improve seed oleic acid content in four elite and popular peanut (<i>Arachis hypogaea</i> L.) cultivars with high oil content

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<p>High oleic acid composition is an important determinant of seed quality in peanut (Arachis hypogaea) in regard to its nutritional benefits for human health and prolonged shelf-life for peanut products. To improve the oleic acid content of popular peanut cultivars in China, four peanut cultivars of different market types were hybridized with high-oleic-acid donors and backcrossed for four generations as recurrent parents using fad2 marker-assisted backcross selection. Seed quality traits in advanced generations derived by selfing were assessed using near-infrared reflectance spectroscopy for detection of oleic acid and Kompetitive allele-specific PCR (KASP) screening of fad2 mutant markers. Twenty-four high-oleic-acid lines of BC4F4 and BC4F5 populations, with morphological features and agronomic traits similar to those of the recurrent parents, were obtained within 5 years. The genetic backgrounds of BC4F5 lines were estimated using the KASP assay, which revealed the genetic background recovery rate was 79.49%–92.31%. The superior lines raised are undergoing a multi-location test for cultivar registration and release. To our knowledge, this is the first application of single nucleotide polymorphism markers based on the high-throughput and cost-effective KASP assay for detection of fad2 mutations and genetic background evaluation in a peanut breeding program.</p>

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