Collecting tissue for DNA (Dan E.)

Hello Rieseberglers.

Almost all of us collect tissue for DNA but there are always new people in the lab, some of whom may have never worked with plants, or even DNA I suppose, and who might benefit from the experience of seasoned plant geneticists. This post contains my advice on collecting sunflower, or other plant, tissue for DNA work. If you have any tips, or alternatives please contribute in the comments.
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