Molecular Breeding

, Volume 21, Issue 2, pp 149–157

Marker-assisted selection for white mold resistance in common bean



A marker-assisted selection (MAS) study was conducted on two recombinant inbred line (RIL) populations of common bean (Phaseolus vulgaris) to test the effectiveness of MAS for resistance to white mold (Sclerotinia sclerotiorum). Markers for quantitative trait loci (QTL) on linkage groups B2 and B7 that were previously associated with resistance and plant architectural avoidance traits in the resistant parent Bunsi were chosen. In the Bunsi/Midland population 10 RILs included in the MAS selected group developed significantly less disease than the control group based on two years of field evaluation under white mold pressure. Growth habit had no significant effect on disease severity or incidence. In the Bunsi/Raven RIL population, disease scores in the MAS selected group were significantly lower than scores in the control group over two years. Additional progress in enhancing resistance to white mold was detected when yield and plant architecture were included in the selection process. Lower disease scores among RILs were observed when comparisons were made to RILs selected using MAS alone. Yield is an important trait that should be considered when selecting for resistance to white mold. Finally the potential of Bunsi as a genetic donor of QTL for white mold resistance was confirmed in both populations studied. This study supported the effectiveness of MAS to enhance selection for a complexly inherited trait such as resistance to white mold in common bean.


Colocalization Disease avoidance Phaseolus vulgaris Plant architecture QTL Sclerotinia sclerotiorum 



Amplified fragment length polymorphism


Disease incidence


Disease severity index


Marker assisted selection


Random amplified polymorphic DNA


Recombinant inbred lines


Resistance to oxalate


Quantitative trait loci


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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Marcio Ender
    • 1
  • Karolyn Terpstra
    • 1
  • James D. Kelly
    • 1
  1. 1.Crop and Soil SciencesMichigan State UniversityEast LansingUSA

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