An Eight-Parent Multiparent Advanced Generation Inter-Cross Population for Winter-Sown Wheat: Creation, Properties, and Validation

摘要: MAGIC populations represent one of a new generation crop genetic mapping resources combining high recombination and diversity. We describe the creation validation an eight-parent population consisting 1091 F7 lines winter-sown wheat (Triticum aestivum L.). Analyses based on genotypes from 90,000-single nucleotide polymorphism (SNP) array find to be well-suited as platform for fine-mapping quantitative trait loci (QTL) gene isolation. Patterns linkage disequilibrium (LD) show highly recombined; marker diversity among founders was 74% that captured in larger set 64 varieties, 54% SNPs segregating also segregated eight founder lines. In contrast, commonly used reference bi-parental had only varieties with 27% segregating. demonstrate potential this resource by identifying diagnostic morphological character "awn presence/absence" independently validate it association-mapping panel. These analyses large, diverse, recombined powerful dissection target traits wheat, is well-placed efficiently exploit ongoing advances phenomics genomics. Genetic data, together instructions access seed, are available at http://www.niab.com/MAGIC/.