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Published online 24 January 2006
Published in Crop Sci 46:224-233 (2006)
© 2006 Crop Science Society of America
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Quantitative Trait Loci underlying Resistance to Three Soybean Cyst Nematode Populations in Soybean PI 404198A

B. Guoa, D. A. Sleperb,*, H. T. Nguyena, P. R. Arellic and J. G. Shannona

a Division of Plant Science and National Center for Soybean Biotechnology, University of Missouri-Columbia, Columbia, MO 65211
b Division of Plant Science, 271-F Life Sciences Center, University of Missouri-Columbia, Columbia, MO 65211-7310
c USDA-ARS-MSA, 605 Airways Blvd., Jackson, TN 38301


Figure 1
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  		Fig. 1. Distribution of average female index (FI), expressed as percentage of susceptible control ‘Hutcheson’, of F2:3 families from soybean cross PI 404198A x Magellan. The FI of parents are indicated by arrow. PI 404198A: SCN resistant parent. Magellan: SCN susceptible parent.

 

Figure 2
Figure 2
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  		Fig. 2. Linkage map constructed using MAPMAKER/EXP from soybean cross Magellan x PI 404198A. Haldane map function was used. Linkage was declared at LOD ≥ 3.0 and a maximum distance of 50 cM. PI 404198A: SCN resistant parent. Magellan: SCN susceptible parent. Unassigned SSR markers were placed on the appropriate positions according to the soybean composite linkage map. QTLs are indicated by the bars on the right of linkage groups and their 1 – LOD confidence intervals are given by the length of bars (the location and confidence interval of QTL on B1 are undetermined because Satt453 was unlinked with other molecular markers): r1—Race 1, r2—Race 2, r5—Race 5. Bold SSR markers are dominant.

 




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