Molecular mapping of a locus controlling resistance to albugo candida in Brassica rapa Article

Kole, C, Teutonico, R, Mengistu, A et al. (1996). Molecular mapping of a locus controlling resistance to albugo candida in Brassica rapa . 86(4), 367-369. 10.1094/Phyto-86-367

cited authors

  • Kole, C; Teutonico, R; Mengistu, A; Williams, PH; Osborn, TC

authors

abstract

  • White rust, caused by Albugo Candida, is an economically important disease of crucifers. Genetic analysis for resistance to race 2 of A. candida in an F2 population and a set of F3 families both derived from a cross between Brassica rapa cultivars Per (resistant) and R-500 (susceptible) revealed that resistance is controlled by a dominant allele at a single locus. White rust resistance was associated with leaf pubescence, which also was governed by a dominant allele at a single locus. The resistance locus (ACA1) was mapped by linkage analysis with 144 restriction fragment length polymorphism (RFLP) loci segregating among the F3 families. The ACA1 locus was mapped to linkage group 4 and was flanked by RFLP marker loci ec2b3a (5.4 centimorgans [cM]) and wg6c1a (5.0 cM). ACA1 was linked to the leaf pubescence locus PUB1 by 13.3 cM. The linked RFLP markers and leaf pubescence may be useful in introgression and map-based cloning of white rust resistance in B. rapa and its related species.

publication date

  • January 1, 1996

Digital Object Identifier (DOI)

start page

  • 367

end page

  • 369

volume

  • 86

issue

  • 4