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

Re: DNA and pollen viability in hosta

  • Subject: Re: DNA and pollen viability in hosta
  • From: halinar@open.org
  • Date: Sat, 2 Mar 2002 19:38:14 -0800 (PST)


>Therefore most standard deviations from the species are around 0.2% 
>as published. 

How do you get a standard deviation based as a percentage?  A standard 
devistion is just a measure of the variation of the mean around the 
mean and is expressed in the same units as are used in the data.

If you have a 0.2% error and hosta generally average about 30 pg DNA, 
that gives a standard deviation of 0.6 pg and a 95% confidence level 
of +/- 1.2 pg.  I believe you said most hosta are between 28 and 32 pg 
DNA.  A hosta measured at 28 pg could be 29.2 pg while a hosta with 30 
pg could be 28.8.  Your error rate is such that you need at least a 
2.4 pg difference bvetween any two hostas before you can consider them 
to be significently different.  Given that most hosta vary only 
between 28 and 32 pg, I don't see how the DNA data can be of any great 
value by itself.  At best all you can do is seperate the hosta species 
into maybe three DNA groups: low, medium and high DNA levels.

This isn't to say the DNA content isn't valuable information, but it 
is only valuable when combined with other information.

Joe Halinar
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