I'm having problems amplifying the intergenic region (IGR) of the ambisense Tospovirus (IYSV). This region is AT rich and has loops. For this I've tried different primer pairs and tried optimization using all possible methods.
Thanks Amanda and Himashu for ur kind reply, I'll definitely try to follow ur suggestions.
but Earlier i've used different specific primers with various annealing temperatures. I've also used Pfu DNA polymerase but positive results r not yet found.