Figure 4.

Potential marker genes for the two anther stages based on similar expression values in all three lines. The coloring is based on the log2 values of absolute dye intensities normalized to the median value of all hybridized probes in a given tissue sample. The high and low expression probes are shown in red and green, respectively: the higher the absolute value of the hybridization signals deviates from the median, the brighter the color. A, A619; N, ND101/W23 hybrid; W, W23.