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Published online 31 January 2005
Published in Crop Sci 45:503-510 (2005)
© 2005 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Confirming QTLs and Finding Additional Loci Conditioning Sheath Blight Resistance in Rice Using Recombinant Inbred Lines

Shannon R. M. Pinsona,*, Fabian M. Capdevielleb and James H. Oardb

a USDA-ARS Rice Research Unit, 1509 Aggie Drive, Beaumont, TX 77713
b LSU Ag Center, Agronomy Dep., Baton Rouge, LA 70803


Figure 1
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  		Fig. 1. The frequency distributions of sheath blight response ratings (SBR) of 300 recombinant inbred lines (RILs) from the cross ‘Lemont’ x ‘Teqing’ in a 2-year replicated field experiment exhibited continuous variation for SBR with skewing toward resistance both years.

 

Figure 2
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  		Fig. 2. Estimated location of rice quantitative trait loci (QTLs) affecting sheath blight (SB) resistance, plant height, and heading date identified from present analysis of recombinant inbred lines (RILs) derived from ‘Lemont’ and ‘Teqing’ and comparatively mapped with SB-QTLs from two prior studies involving F2 and/or F3 progeny (Li et al., 1995a; Zou et al., 2000). The shaded boxes cover the region where the QTLs are most likely located based on where the likelihood score was within 1 LOD of its maximal value.

 




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