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a thousand years??

Unless you are a creationist but...
The difference in DNA content between say H minor and H.longipes 
is about 10 picogram or bases. Humans have in 
total about 7 pg Do you really think that that amount of bases can 
come along in a 1000 years, without changing the number of 
chromosomes? Venusta separated from H. minor about 10.000 
years ago and both still have about the same amount of DNA in 
each nucleus. Based on that, my guess is that the japanese hosta 
species separated from the korean Hosta species at least 100.000 
and maybe even half a million years ago. 
Ben J.M.Zonneveld
Clusius lab pobox 9505
2300 RA Leiden
The Netherlands
Fax: 31-71-5274999
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