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  Topic: Southstar's thread< Next Oldest | Next Newest >  

Posts: 150
Joined: Nov. 2011

(Permalink) Posted: Nov. 09 2011,08:01   

Quote (George @ Nov. 09 2011,07:55)
[quote=Southstar,Nov. 09 2011,06:39][quote=George,Nov. 09 2011,04:45]
Quote (Dr.GH @ Nov. 08 2011,12:23)
Quote (Southstar @ Nov. 08 2011,09:39)

I've just finished reading a paper in the New Journal of Botany on the evolution and taxonomy of the narrow-leaved marsh orchid complex (within Dactylorhiza) in Britain, Ireland and the rest of Europe.  These have all originated as allopolyploids of the same two diploid species in apparently four separate episodes.  In other words, two species hybridise and the hybrid undergoes genome duplication, which results in instant reproductive isolation (more or less).  Biogeographical and molecular evidence suggests that three species evolved after the last glacial maximum, whereas the fourth predates it.  What's really interesting are the differences in ecological (habitat) preferences shown by these four species, which serves to further isolate each species from the others, setting them on separate evolutionary trajectories.


Could you give me a link to the paper.

Marty should work.  If not, let me know and I'll see what I can do.


I was about to post it then i read the first line of the study "This subjective and highly personal commentary critically reviews..."

They, the dims, have a thing for picking stuff like this out of even well written papers and with that saying something stupid like... See even the people writing it call it a personal whim "see she's puting out rubbish" ha ha ha. I really need to stay a step or two ahead of them.

Thanks anyway

"Cows who know a moose when they see one will do infinitely better than a cow that pairs with a moose because they cannot see the difference either." Gary Gaulin

  366 replies since Nov. 08 2011,06:46 < Next Oldest | Next Newest >  

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