Fig. 4From: Genome-wide analysis of the pentatricopeptide repeat gene family in different maize genomes and its important role in kernel developmentDistribution of segmentally duplicated PPR genes in the maize genome. The grey lines indicate the segmentally duplicated gene pairs in the maize genome, and the red lines indicated the segmentally duplicated PPR gene pairs in (a) the B73 genome and (b) the PH207 genomeBack to article page