Comparative QTL Map for White Mold Resistance in Common Bean, and Characterization of Partial Resistance in Dry Bean Lines VA19 and I9365‐3

• DOI: 10.2135/cropsci2010.06.0356
• Publication Date: 2010-12-27T20:43:16Z
• Authors: Marilyn Soule; Lyndon Porter; Juliana Medina; Gloria P. Santana; Matthew W. Blair; Phillip N. Miklas
• Keywords: Sclerotinia Sclerotiorum; Genetic linkage; White (mutation)

White mold caused by the necrotrophic fungus Sclerotinia sclerotiorum (Lib.) de Bary limits common bean ( Phaseolus vulgaris L.) production in temperate climates. Disease resistance has been identified, but breeding is hampered a paucity of sources and complex inheritance, as numerous quantitative trait loci (QTL) conditioning partial have found. Our objectives were to characterize white found lines I9365‐31 VA19 construct comparative linkage map for all QTL identified date. Recombinant inbred line (RIL) populations ‘Benton’/VA19 (BV) ‘Raven’/I9365‐31 (R31) consisting 79 F 6 105 5 RILs, respectively, evaluated (WM) reaction multiple greenhouse field tests. Two BV, WM2.2 expressed R 2 = 33%) (13%) WM8.3 (11%) only, seven R31 (WM2.2, WM4.2, WM5.3, WM5.4, WM6.1, WM7.3, WM8.4), three tests four field, ranging phenotypic variance from 52%. These compared with 26 previously QTL, resulting 35 which coalesced into 21 distinct regions across nine groups. Four novel. Sequence characterized amplified region markers associated WM2.2, WM8.3, WM7.3 generated. The provides framework integrating interpreting future studies concerning bean.