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Quantitative Trait Loci for Root Architecture Traits Correlated with Phosphorus Acquisition in Common Bean

^a Centro Internacional de Agricultura Tropical (CIAT), A.A. 6713, Cali, Colombia
^b South China Agricultural Univ., Guangzhou, PRC
^c Univ. of Nebraska, Lincoln, NE, USA
^d Univ. of Florida, Hastings, FL, USA
^e Pennsylvania State Univ., University Park, PA, USA

View larger version (39K): [in a new window]   Fig. 1. Positions of quantitative trait loci (QTLs) for root and P uptake traits on nine linkage groups from the DOR364 3 G19833 genetic map. Linkage group designation as per Freyre et al. (1998). Genetic markers include amplified fragment length polymorphisms (DA, DC, GA, or GC), microsatellites (BM), sequence characterized amplified regions (1 5 Ppd and 2 5 Hr), RFLPs (Bng, D) and random amplified polymorphic DNA (all others). The QTLs for individual (thin line) and joint (thick bar) composite interval mapping analysis are indicated vertically to the left of the linkage group, where joint analysis for P accumulation in the low-P field, in combination with basal root length (RL) in the greenhouse, is indicated by a white bar; specific RL in the low-P field is indicated by a black bar; and RL in the low-P field is indicated by a stippled bar. A horizontal line across the QTLs indicates position of highest LOD peak within individual and joint QTL. Only QTL detected for individual traits are named as indicated in Table 4.

View larger version (15K): [in a new window]   Fig. 2. Significance of joint and individual quantitative trait loci (QTLs) for specific root length and P accumulation on Linkage Group B10. Results are represented as a likelihood of odds trace from composite interval QTL mapping analysis. Genetic markers and distances are as in Fig. 1.