Quantitative trait loci analysis for resistance to Cephalosporium stripe, a vascular wilt disease of wheat
作者： Martin C. Quincke , C. James Peterson , Robert S. Zemetra , Jennifer L. Hansen , Jianli Chen
DOI: 10.1007/S00122-011-1535-6
关键词:
摘要: Cephalosporium stripe, caused by gramineum, can cause severe loss of wheat (Triticum aestivum L.) yield and grain quality be an important factor limiting adoption conservation tillage practices. Selecting for resistance to stripe is problematic; however, as optimum conditions disease do not occur annually under natural conditions, inoculum levels spatially heterogeneous, little known about the inheritance resistance. A population 268 recombinant inbred lines (RILs) derived from a cross between two cultivars was characterized using field screening molecular markers investigate stripe. Whiteheads (sterile heads pathogen infection) were measured on each RIL in three environments artificially inoculated conditions. linkage map this created based 204 SSR DArT markers. total 36 groups resolved, representing portions all chromosomes except chromosome 1D, which lacked sufficient number polymorphic Quantitative trait locus (QTL) analysis identified seven regions associated with approximately equal additive effects. Four QTL more susceptible parent (Brundage) came resistant (Coda), but cumulative, effect Coda greater than that Brundage. Additivity effects confirmed through regression demonstrates advantage accumulating multiple alleles achieve high
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