Molecular genetic analysis of spring wheat core collection using genetic diversity, population structure, and linkage disequilibrium.

摘要: Wheat (Triticum aestivium L.) is an important crop globally which has a complex genome. To identify the parents with useful agronomic characteristics that could be used in various breeding programs, it very to understand genetic diversity among global wheat genotypes. Also, understanding studies such as marker-assisted selection (MAS), genome-wide association (GWAS), and genomic selection. wheat, set of 103 spring genotypes represented five different continents were used. These genotyped using 36,720 genotyping-by-sequencing derived SNPs (GBS-SNPs) well distributed across chromosomes. The tested 103-wheat contained three subpopulations based on population structure, principle coordinate, kinship analyses. A significant variation was found within AMOVA. Subpopulation 1 more diverse subpopulation allelic patterns (Na, Ne, I, h, uh). No high linkage disequilibrium between SNPs. However, level, D genome have highest LD compared two other genomes B. ratio number LD/number non-significant suggested chromosomes 2D, 5A, 7B are their value 0.08, 0.07, 0.05, respectively. Based decay, lowest haplotype blocks chromosome 2D. recent study concluded 103-spring GBS-SNP markers appropriate for GWAS QTL-mapping. core collection comprises subpopulations. Genotypes most future programs if they desired traits. distribution hotspots investigated provides information regions includes interesting genes.