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Genetics of Soybean Agronomic Traits

II. Interactions between Yield Quantitative Trait Loci in Soybean

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

View larger version (30K): [in a new window]   Fig. 1 Yield (—) and maturity (R8) (- -) LOD scores graphed across the linkage maps of U9 and U3 by simple interval mapping. LOD scores (y-axis) are graphed against genome position (x-axis). Molecular markers on the linkage groups are shown. (Additional markers can be obtained from website http://www.larklab.4biz.net/; verified 13 May 1999) LOD scores above 3.7 are significant at an experiment-wide threshold of 0.05

View larger version (32K): [in a new window]   Fig. 2 Segregation of yield QTLs linked to Satt277 and B172_2 — sub-populations corresponding to the two alleles at each locus or to each of the four alleles of the pair of interacting loci. The average of three environments is shown in (a) as well as the values for each of the three individual environments in (b, c, and d). For each panel (1–4) the plants in each allelic sub-population are ranked along the y-axis according to increasing yield value (x-axis). Panels 1 and 4 show the two allelic sub-populations at the Satt277 or B172_2 loci respectively. An open triangle represents the sub-population with the Noir l allele and a closed triangle represents the sub-population with the Archer allele. Panels 2 and 3 show the four allelic sub-populations corresponding to segregants at both loci: (•) Archer allele of B172_2 and Noir allele of Satt277; () = Archer allele of both; () = Noir1 allele of both; () = Noir allele of B172_2 and Archer allele of Satt277

View larger version (31K): [in a new window]   Fig. 3 Segregation of yield (a) and seed weight (b) QTLs linked to Satt561 and Satt507 in Minnesota in 1997— sub-populations corresponding to the two alleles at each locus or to each of the four alleles of the pair of interacting loci. For each panel (1–4) the plants in each allelic sub-population are ranked along the y-axis according to increasing yield or seed weight values (x-axis). Panels 1 and 4 show the allelic sub-populations of the Satt561 or Satt507 loci, respectively. An open triangle represents the population with the Minsoy allele and a closed triangle represents the population with the Archer allele. Panels 2 and 3 show the four allelic sub-populations corresponding to segregants at the two loci: (•) Archer allele of Satt507 and Minsoy allele of Satt561; () = Archer allele of both; () = Minsoy allele of both; () = Minsoy allele of Satt507 and Archer allele of Satt561

View larger version (30K): [in a new window]   Fig. 4 Segregation of yield (a) and seed weight (b) QTLs linked to Satt561 and Satt507 in Chile in 1995— sub-populations corresponding to the two alleles at each locus or to each of the four alleles of the pair of interacting loci. For each panel (1–4) the plants in each allelic sub-population are ranked along the y-axis according to increasing yield or seed weight values (x-axis). Panels 1 and 4 show the allelic sub-populations of the Satt561 or Satt507 loci, respectively. An open triangle represents the population with the Minsoy allele and a closed triangle represents the population with the Archer allele. Panels 2 and 3 show the four allelic sub-populations corresponding to segregants at the two loci: (•) Archer allele of Satt507 and Minsoy allele of Satt561; () = Archer allele of both; () = Minsoy allele of both; () = Minsoy allele of Satt507 and Archer allele of Satt561