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Soybean Quantitative Trait Loci for Resistance to Insects

^a Dep. of Biology, University of Utah, Salt Lake City, UT 84112 USA
^b Dept. of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108 USA
^c Facultad de Agronomia, Universidad Catholica de Valpariso, Casilla 4-D, Quillota, Chile

View larger version (40K): [in a new window]   Fig. 1 Segregation of QTLs associated with larval weight at Day 12 of development as shown by the cumulative frequency distribution of recombinant inbred (RI) values; subpopulations correspond with alleles at (A) Sat_112 or (C) Satt575 on Linkage Group U2 or at (B and D) Satt302 on Linkage Group U10. Data for the Minsoy x Noir 1 population are presented in (A) and (B) and for the Minsoy x Archer population in (C) and (D). Parental values are indicated

View larger version (30K): [in a new window]   Fig. 2 Composite Minsoy x Noir1 cross (MN) and Minsoy x Archer cross (MA) genetic maps of the relevant portions of the linkage groups with significant quantitative trait loci for corn earworm larval development traits. The symbols to the left of the marker names indicate the mapping populations in which the marker segregated (i.e., was polymorphic). The number to the right of the marker names indicates the map distance to the next marker (in centimorgans). Markers listed in Table 2 are indicated in bold. Linkage groups are labeled with both the Utah names and, in parentheses, the Iowa names (e.g., J)

View larger version (35K): [in a new window]   Fig. 3 Simple interval mapping of log of the odds (LOD) scores associated with corn earworm larval development traits for Linkage Groups U2, U8, U9, U10, and U11 in both recombinant inbred populations. Linkage groups are drawn to scale. The linkage group position (x-axis) is graphed against the LOD score (y-axis) for each population. A threshold line for significant quantitative trait loci (QTL) at a LOD score of 2.5 is presented. The first column of graphs represents the linkage groups with significant QTLs in the Minsoy x Noir1 cross (MN) population only; the second column, those with significance in both RI populations; and the third, those with significance in the Minsoy x Archer cross (MA) population only. Markers are labeled along the x-axis of each linkage group and correspond with the markers and distances listed in Fig. 2