Results
Frequency and distribution of different SSRs in rice planthopper ESTs
In total, 2491 rice planthopper clusters of EST sequences (2335 BPH and 156 WBPH) were downloaded from the NCBI EST database and the total length were 917 kb and 83 kb for BPH and WBPH, respectively. SSRIT analysis showed that 12.8% (298/2335) of BPH EST sequences clusters and 14.1% (22/156) of WBPH EST clusters contained SSR motifs. And then, totally 397 and 25 pairs of SSR primers were detected in the BPH and WBPH EST sequences, respectively.