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Published online 18 May 2006
Published in Crop Sci 46:1609-1621 (2006)
© 2006 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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QTL Analysis of Adventitious Root Formation in Common Bean under Contrasting Phosphorus Availability

Ivan E. Ochoaa, Matthew W. Blairb and Jonathan P. Lyncha,*

a Department of Horticulture, The Pennsylvania State University, University Park, PA 16802, USA
b International Center for Tropical Agriculture (CIAT), A.A. 6713, Cali, Colombia


Figure 1
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  		Fig. 1. Frequency distributions of 76 RILs and their parents ‘G2333’ (A) and ‘G19839’ (B) for four adventitious root traits under field (a) and greenhouse (b) conditions in high- and low-phosphorus environments. Arrows indicate frequency class for the parents.

 

Figure 2
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  		Fig. 2. Extended adventitious roots, adventitious root primordia, and total number of adventitious root meristems in the parental lines G2333 and G19839 under high- (HP) and low- (LP) phosphorus availability.

 

Figure 3
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  		Fig. 3. Allometric relationships between the root type biomass (log scale) and shoot biomass (log scale) of 76 RILs from G2333 x G19839 grown under high- (HP) and low- (LP) phosphorus availability measured at 2 wk after germination in nutrient solution (a) and 6 wk after planting in the field (b).

 

Figure 4
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  		Fig. 4. Molecular markers and map location of putative QTL for several adventitious root traits in G2333/G19839 RIL population under high- (HP) and low-phosphorus (LP) conditions in the field (F) and greenhouse (G). Horizontal ticks perpendicular to the QTL bar indicate peak LOD location. For trait meanings, refer to Table 2.

 




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