Figure 1From: Next generation sequencing analysis reveals a relationship between rDNA unit diversity and locus number in Nicotiana diploids(A) Structure of 35S rDNA unit in Nicotiana (redrawn from[34]). The transcription start site is arrowed. IGS = intergenic spacer, ITS = internal transcribed spacer (B) PCR primer binding sites to the 18S and 5.8S rDNA unit and 454 sequencing reads generated. The total amplicon length was 650 bp.Back to article page