Advances on Methodologies for Genome-wide Association Studies in Plants Disease Resistance in Maize and the Role of Molecular Breeding in Defending Against Global Threat Genome Wide Association Study: Opportunities and Challenges in Genomic Research Genome-wide Association Study of Agronomic and Yield Traits in a Worldwide Collection of Peanut (Arachis hypogaea) Germplasm Nucleotide Variation in the NCED3 Region of Arabidopsis thaliana and its Association Study with Abscisic Acid Content under Drought Stress Advances and Applications in Crop Quantitative Trait Locus Genetic Analysis of Vegetative Ground Cover Rate in Winter Wheat Using Digital Imaging