marker-assisted selection in wheat - ictsd

64Marker-assisted selection – Current status and future perspectives in crops, livestock, forestry and fishFigure 3Frequency distribution for number of plus alleles found for five QTLs706050Number of plants4030201000 1 2 3 4 5 6 7 8 9 10Number of plus allelesThe two contrasting marker selections, i.e. NUEplus (right) and NUEmin (left), are marked in blue.Figure 4Performance of the marker selections, NUEmin (white) and NUEplus (blue) on hydroponicsat low N-supply (2.5%N in leaves) and high N-supply (5%N in leaves). The performance isexpressed as a percentage of the mean of the two selections60 80 100 12060 80 100 120Tiller numberDry weight rootsDry weight shootsLeaf lengthRoot weight ratioLow N - supply High N - supplyselection showed a remarkable 40 percenthigher tillering rate and dry matter productionthan the NUEmin selection. The40 percent higher tillering rate is associatedwith a 40 percent higher leaf area increaseafter defoliation (data not shown). Relativeroot growth (expressed as the ratio of rootto total growth) and leaf length were hardly