Dear Helmut, and all,
Given what you said about identification of Brassicaceae, would a DNA-based assay be of interest? We are working on some assays for other genera at the moment, based on species-specific polymorphisms, and the results are very promising with desiccated material up to 2500yrs bp. I have some experience with Brassica genomics, so I have some ideas of targets for an assay for Brassicaceae. I wonder whether anyone would like to collaborate by offering small numbers of samples to test, if I do the work on the bioinformatics? Desiccated seeds give the best chance of a good signal, and I have heard of charred material working, but I understand it can be very frustrating!
Dr. Jonathan Moore
Warwick HRI, UK
>Date: Tue, 4 Mar 2008 10:07:10 +0100
>From: Helmut Kroll <[log in to unmask]>
>Subject: Sinapis alba
>I looked into my old kartothek:
>The only Roman reference of cf. Sinapis alba is
>K.-H. Knoerzer, Roemerzeitliche Pflanzenreste aus einem Brunnen bei Butzba=
>Hessen. Saalburg-Jahrbuch 30, 1973, 71-114.
>Brassica/Sinapis and similar genera are very difficult to determine; best =
>many findings are necessary to give a decent determination.
>Nearly all "Sinapis" I have seen was Brassica nigra!
>[I - personly - believe that Sinapis alba comes in the Middle Ages to Cent=