Development of EST-SSR markers in peanut (Arachis hypogaea L.)

摘要

More molecular markers for potential use in peanut genetic research were developed. A total of 92403 EST sequences of peanut (Arachis) in the NCBI database were downloaded and analyzed. 2594 SSRs distributed in 2267 non-redundant EST sequences were detected, with tri-nucleotide motif (65.54%) as the most abundant motif type followed by di-nucleotide motif (28.10%). Among the 92 repeat types, the top eight motif types were AG/TC (20.1%), AAG/TTC (11.8%), AAT/TTA (10.1%), AGG/TCC (6.6%), AGA/TCT (6.3%), AT/TA (5.9%), ACT/TGA (3.8%), and ATG/TAC (3.7%) with higher frequency. A total of 237 primer pairs were successfully designed based on the 2267 SSR-ESTs using DNA star software.