hort.net Seasonal photo, (c) 2006 Christopher P. Lindsey, All Rights Reserved: do not copy
articles | gallery of plants | blog | tech blog | plant profiles | patents | mailing lists | top stories | links | shorturl service | tom clothier's archive0
Gallery of Plants
Tech Blog
Plant Profiles
Mailing Lists
    Search ALL lists
    Search help
    Subscription info
Top Stories
sHORTurl service
Tom Clothier's Archive
 Top Stories
New Trillium species discovered

Disease could hit Britain's trees hard

Ten of the best snowdrop cultivars

Plant protein database helps identify plant gene functions

Dendroclimatologists record history through trees

Potato beetle could be thwarted through gene manipulation

Hawaii expands coffee farm quarantine

Study explains flower petal loss

RSS story archive

Answersering ploidy questions

As my answers to Andrew were drowned in the reply I give them  again
here separately 
If ventricosa (41pg)  crosses with another tetraploid plant like some  
Fortuneis (51)The tetraploid offspring will have 1/2 ( 41+ 51) = 46pg. 
If ventricosa crosses with a diploid plant let say sieboldiana (25pg)  
the  triploid ofspring will have 1/2 (41+25)=33 pg 
So this excludes ventricosa as a parent for S&S (39) 
If we cross a tetraploid fortunei like some Patriots with a diploid  
sieboldiana, the triploid offspring will have 1/2 ( 51+ 25) = 38 pg so  
this is most likely. 

I did not ask for a full transcript of my article on ploidy, but just
the fact that an article has appeared would have been nice 
diploid  hosta: 2x = 2n = 60 chromosomes 
tetraploid Hosta 2n=4x=120 
Flow cytometry doen not give chromsome numbers but the amount  
of DNA so I can only say that the amount of DNA is twice as high  
suggesting a tetraploid For the amount of DNA the C is used So  
8C means 8 times as much DNA as in the gamete ( =C). 
As Jim said polyploidy in tc is fairly rare An explanation for the  
slow growing ones could be : selection for plants adapted to tc but  
doing bad in real life This will happen  especially if a tc culture is  
not refreshed regularly  

All roots in hosta are adventitious roots Divisions or new shoots are  
 like ( very short in the case of hosta)branches in a tree 

Ben J.M.Zonneveld
Clusius lab pobox 9505
2300 RA Leiden
The Netherlands
Fax: 31-71-5274999
To sign-off this list, send email to majordomo@mallorn.com with the

 © 1995-2017 Mallorn Computing, Inc.All Rights Reserved.
Our Privacy Statement
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index