Four QTL clusters containing major and stable QTLs for saturated fatty acid contents in a dense genetic map of cultivated peanut (Arachis hypogaea L.)

• DOI: 10.1007/s11032-019-0934-2
• Publication Date: 2019-02-09T01:22:54Z
• Authors: Nian Liu; Hao Chen; Dongxin Huai; Fujian Xia; Li Huang; Weigang Chen; Bei Wu; Xiaoping Ren; Huaiyong Luo; Xiaojing Zhou; Yuning Chen; Yong Lei; Boshou Liao; Huifang Jiang
• Keywords: Epistasis; Arachis; Saturated fatty acid; Arachis hypogaea; Stearic acid; Unsaturated fatty acid; Inbred strain

Peanut is an important source of edible vegetable oils worldwide. Saturated fatty acid content a key factor that affects the quality peanut oil; thus, reducing its objective in breeding. In this study, we constructed dense genetic map recombinant inbred line (RIL) population (Zhonghua 10 × ICG 12625) with 1443 SSR loci, covering total length 2279.10 cM. Using phenotypic data from three environments, have identified 59 additive QTLs including eight stable ones and nine epistatic for various acids. Combination conditional unconditional QTL analyses further revealed there was high correlation between stearic very long-chain saturated addition, four clusters (CLB04-1, CLB04-2, CLB04-3, CLB06) harboring major acids were identified, which explained 10.77–36.73%, 35.10–41.89%, 10.79–39.18%, 4.85–20.32% variations, respectively. The physical interval located at pseudomolecule B04 B06 Arachis ipaensis, containing putative genes encode enzymes transcription factors involved biosynthesis pathways. This study comprehensively analyzed components controlled profiles large effects. Our results could provide platform gene discovery guide development markers genome-wide assisted selection varieties desired