has subject area Biomarkers - Genetic Markers Chromosome Mapping Disease Attributes - Disease Resistance Genes - Genes, Plant Genome, Plant - Genes, Plant Genotype Helianthus Immunity - Disease Resistance Immunity, Innate - Disease Resistance Oomycetes Phenotype - Genetic Markers Plant Diseases Plant Physiological Phenomena - Disease Resistance Polymorphism, Single Nucleotide