Summary of SPE Genes Conserved between and Unique for Different Tissues in Four-Way Venn Diagrams.
(A) SPE_B genes expressed only in B73 and the two reciprocal hybrids.
(B) SPE_M genes expressed only in Mo17 and the two reciprocal hybrids. The larger numbers in each square field indicate all genes that display the SPE pattern, and the smaller numbers below indicate how many of the SPE genes are expressed only in the tissue(s) in which they display SPE.