Fig. 4From: Genome-wide identification of the peptide transporter family in rice and analysis of the PTR expression modulation in two near-isogenic lines with different nitrogen use efficiencyWhole genome duplications of rice using PTR genes. X-axis indicates the synonymous mutation rate Ks. Y-axis indicates PTR paralogous gene pairs. Evry peak represents a genome duplication event. The farther away from the origin represents the earlier the genome duplication event occursBack to article page