McDonald Samuel C, Buck James W, Li Zenglu
Institute of Plant Breeding, Genetics, and Genomics and Department of Crop and Soil Sciences, University of Georgia, Athens, GA USA.
Department of Plant Pathology, University of Georgia, Griffin, GA USA.
Mol Breed. 2023 May 27;43(6):49. doi: 10.1007/s11032-023-01397-x. eCollection 2023 Jun.
Frogeye leaf spot is a yield-reducing disease of soybean caused by the pathogen . has provided durable resistance to all known races of since its discovery in the cultivar Davis during the 1980s. Using a recombinant inbred line population derived from a cross between Davis and the susceptible cultivar Forrest, was fine-mapped to a 1.15 Mb interval on chromosome 16. This single locus was confirmed by tracing in resistant and susceptible progeny derived from Davis, as well as three near-isogenic lines. Haplotype analysis in the ancestors of Davis indicated that Davis has the same haplotype at the locus as susceptible cultivars in its paternal lineage. On the basis of these results, it is hypothesized that the resistance allele in Davis resulted from a mutation of a susceptibility allele. Tightly linked SNP markers at the locus identified in this research can be used for effective marker-assisted selection.
The online version contains supplementary material available at 10.1007/s11032-023-01397-x.
蛙眼病斑是由病原体引起的大豆减产病害。自20世纪80年代在戴维斯品种中发现以来，它对所有已知的该病原体小种都具有持久抗性。利用从戴维斯和感病品种福里斯特杂交后代中衍生出的重组自交系群体，该抗性被精细定位到16号染色体上一个1.15兆碱基的区间。通过在戴维斯衍生的抗性和感病后代以及三个近等基因系中追踪该抗性，证实了这个单一位点。对戴维斯祖先的单倍型分析表明，戴维斯在该位点的单倍型与其父系中的感病品种相同。基于这些结果，推测戴维斯中的抗性等位基因是由一个感病等位基因突变而来。本研究中在该位点鉴定出的紧密连锁的单核苷酸多态性标记可用于有效的标记辅助选择。
在线版本包含可在10.1007/s11032-023-01397-x获取的补充材料。
