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Mapping of a Locus Controlling Resistance to<i>Albugo candida</i>in<i>Brassica napus</i>Using Molecular Markers
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1995
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Plant GeneticsGeneticsPlant PathologyMolecular GeneticsBcp 2GenomicsNon-host ResistancePlant GenomicsPlant HealthWhite RustQuantitative GeneticsLinkage Group 9Genetic VariationPopulation GeneticsFunctional GenomicsPlant BreedingBiologyLocus Controlling ResistanceNatural SciencesEvolutionary BiologyInduced ResistanceMicrobiologyHost ResistanceMedicine
White rust, caused by Albugo candida, is an important disease of crucifers, vegetables, and oilseeds in many countries. A backcross population, BCP 2 , as well as F 1 -derived doubled-haploid (DH) and F 2 populations obtained from the same single F 1 plant, produced from the cultivar Major × Stellar, were used to study the genetic control of resistance to white rust in Brassica napus. The control of resistance to white rust in this cross was attributed to a dominant allele at a single locus, designated ACA1. Other loci may be involved in the control of the intensity of sporulation of the fungus in the plant. The ACA1 locus was mapped with respect to restriction fragment length polymorphism (RFLP) loci in the F 1 DH population. Linkage between the ACA1 locus and nine RFLP loci was observed on linkage group 9 of a B. napus RFLP linkage map