Fig. 6

The expression pattern of embryo sac-preferential/specific genes. Next generation sequencing transcriptome data downloaded from the Rice Genome Annotation Project was used for cluster display. Every row represented a gene and every column represented a tissue (indicated at the top of each column). The genes with similar expression patterns are divided into five clusters: a (preferentially expressed in P1, P2, Pi and S1), b (only in Pi), c (preferentially expressed in P2, Pi and S1), d (expressed in reproductive tissues but not or weak in vegetative tissues), E (expressed in all tissues). The star represented the general expression levels of all genes. The color represented average log (FPKM values + 0.000001) and the color scale was shown at the bottom. L, 20-day-old leaf; Sh, 14 day-old shoot; SL, seedling at four-leaf stage; P1, panicle before emerging from the sheath of the flag leaf; P2, panicle after emerging from the sheath of the flag leaf; An, anther; Pi, pistil before pollination; S1, seed at 5 days after pollination; S2, seed at 10 days after pollination; Em, embryo at 25 days after pollination; En, endosperm at 25 days after pollination