Date: Mon, 22 Feb 1999 18:51:55 From: SCHLAUER@chemie.uni-wuerzburg.de To: email@example.com Message-Id: <aabcdefg540$foo@default> Subject: Re: Sterile Drosera hybrids
Dear Rich & al.,
> I gather their is some
> controversy here but I'm not sure if you are questioning:
> A. the sterility of the plant or
> B. the supposition that the plant is a hybrid with the above named
I do not doubt any of the two possibilities above. I only doubt that
the plant is sterile *just* because it is a hybrid. I guess it may be
sterile due to aneuploidy (the parents perhaps having different
chromosome counts). BTW: Several members of Bryastrum that are usually
considered "pure" species are apparently sterile as well.
> If B, then is it safe to assume that sterility of hybrids is always a
> result of differing ploidy?
Not always. There are other reasons in many cases. In _D. anglica *
rotundifolia_ (the most studied and best known of all sterile
_Drosera_ hybrids), however, sterility is rather certainly the result
of aneuploidy and *not* merely a result of its hybrid nature.
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