Figure 1

Phylogenetic relationships and gene structure of the potato StHsp70 genes: The unrooted tree was generated using a MEGA5.0 program with the full-length amino acid sequences of the potato StHsp70 proteins obtained by a Neighbor-Joining (NJ) method, including 1,000 boot-strap replications. The sub-families of StHsp70 genes (A–E) are highlighted with different colored backgrounds. The exon/intron organization of the StHsp70 genes is also shown as follows: The yellow boxes represent the exons; and the black lines represent the introns. The untranslated regions (UTRs) are indicated by the blue boxes. The numbers 0, 1, and 2 represent the splicing phases. The sizes of the exons and introns can be estimated using the scale detailed at the bottom.