Amplification of Epichloë endophyte microsatellite loci. Ethidium bromide-stained agarose (3% NuSieve) gel of PCR products amplified with primers B10.1 and B10.2 by using genomic DNA (40 pg μl−1) from Lp1 (lane 1), Lp5 (lane 2), Lp13 (lane 3), Lp19 (lane 4), Lp7 (lane 5), Tf27 (lane 6), Tf28 (lane 7), Tf13 (lane 8), Tf18 (lane 9), Fp2 (lane 10), E8 (lane 11), and Fr1 (lane 12). The numbers on the left of the figures indicate the sizes in base pairs of the 50-bp ladder in lane M.