title: Association of Agronomic Traits with SNP Markers in Durum Wheat (Triticum turgidum L. durum (Desf.)).
abstract: Association mapping is a powerful approach to detect associations between traits of interest and genetic markers based on linkage disequilibrium (LD) in molecular plant breeding. In this study, 150 accessions of worldwide originated durum wheat germplasm (Triticum turgidum spp. durum) were genotyped using 1,366 SNP markers. The extent of LD on each chromosome was evaluated. Association of single nucleotide polymorphisms (SNP) markers with ten agronomic traits measured in four consecutive years was analyzed under a mix linear model (MLM). Two hundred and one significant association pairs were detected in the four years. Several markers were associated with one trait, and also some markers were associated with multiple traits. Some of the associated markers were in agreement with previous quantitative trait loci (QTL) analyses. The function and homology analyses of the corresponding ESTs of some SNP markers could explain many of the associations for plant height, length of main spike, number of spikelets on main spike, grain number per plant, and 1000-grain weight, etc. The SNP associations for the observed traits are generally clustered in specific chromosome regions of the wheat genome, mainly in 2A, 5A, 6A, 7A, 1B, and 6B chromosomes. This study demonstrates that association mapping can complement and enhance previous QTL analyses and provide additional information for marker-assisted selection.
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan Hubei, 430070, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.affiliation: Shandong Provincial Key Laboratory of Functional Macromolecular Biophysics, Institute of Biophysics, Dezhou University, Dezhou, Shandong, 253023, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Ren
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan Hubei, 430070, China.
authors.forename: Xifeng
authors.initials: X
authors.lastname: Ren
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan Hubei, 430070, China.
authors.forename: Sisi
authors.initials: S
authors.lastname: Huang
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan Hubei, 430070, China.
authors.forename: Salih A I
authors.initials: SA
authors.lastname: Sabiel
authors.affiliation: Department of Plant Sciences, University of California Davis, Davis, CA, 95616, United States of America.
authors.forename: Mingcheng
authors.initials: M
authors.lastname: Luo
authors.affiliation: Institute of Evolution, University of Haifa, Mount Carmel, Haifa, 31905, Israel.
authors.forename: Eviatar
authors.initials: E
authors.lastname: Nevo
authors.affiliation: Science and Technology Center, China National Seed Group Co., Ltd, Wuhan, Hubei, 430206, China.
authors.forename: Chunjie
authors.initials: C
authors.lastname: Fu
authors.affiliation: Science and Technology Center, China National Seed Group Co., Ltd, Wuhan, Hubei, 430206, China.
authors.forename: Junhua
authors.initials: J
authors.lastname: Peng
authors.affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan Hubei, 430070, China; Hubei Collaborative Innovation Center for Grain Industry, Jingzhou, Hubei, 434025, China.
authors.forename: Dongfa
authors.initials: D
authors.lastname: Sun
mesh_terms: D056726:Genetic Association Studies; D005819:Genetic Markers; D018745:Genome, Plant; D005838:Genotype; D015810:Linkage Disequilibrium; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D040641:Quantitative Trait Loci; D014908:Triticum / Q000235:genetics*
chemical_list: D005819:Genetic Markers