Genetic Dissection of Resistance to Gray Leaf Spot by Combining Genome-Wide Association, Linkage Mapping, and Genomic Prediction in Tropical Maize Germplasm

• DOI: 10.3389/fpls.2020.572027
• Publication Date: 2020-11-02T04:56:59Z
• Authors: Maguta Kibe; Sudha K. Nair; Biswanath Das; Jumbo M. Bright; Dan Makumbi; Johnson Kinyua; L. M. Suresh; Yoseph Beyene; Michael S. Olsen; Boddupalli M. Pra...; Manje Gowda
• Keywords: Germ plasm; Association mapping; Genomic Selection; Genome-wide Association Study; Genetic linkage map; Genetic Association; Genetic linkage

Gray leaf spot (GLS) is one of the major maize foliar diseases in sub-Saharan Africa. Resistance to GLS controlled by multiple genes with additive effect and influenced both genotype environment. The objectives study were dissect genetic architecture resistance through linkage mapping genome-wide association (GWAS) assessing potential genomic prediction (GP). We used biparental populations an panel 410 diverse tropical/subtropical inbred lines that genotyped using sequencing. Phenotypic evaluation two four environments revealed significant genotypic variation moderate high heritability estimates ranging from 0.43 0.69. was negatively significantly correlated grain yield, anthesis date, plant height. Linkage five 22 quantitative trait loci (QTLs) for resistance. A QTL on chromosome 7 (