In article <49n9o2$7tv at mserv1.dl.ac.uk>, "Corinna. Dutton" <Corinna.Dutton at newcastle.ac.uk> writes:
> I have had problems purifying genomic DNA for southerns from potato
> tuders and tobacco leaves. I get problems with polysaccharide
> contamination and low yield with CTAB based methods. Any suggestions for
> protocols which can be carried out on an open bench would be appreciated
You might want to try BioClean (or other glassmilk protocol) after
extraction. I have had to use a very mild extraction (freeze/thay lysis)
followed by bioCleaning to get rid of interfering substances in Iris lacustris.