North American Fruit Explorers mailing list at ibiblio

[Lon Rombough <lonrom@hevanet.com>]

Graft compatibility is one good indication of the relationship among "species".  Pyrus will graft on many species of Crataegus, on Amelanchier, on Cydonia, etc.  Not every variety of pear on every species of these genera, but I suspect many of these are more closely related than we give them credit.  If nothing else, look at the fruit - ALL these genera are pome fruits, with more or less the same internal structure.  That's certainly a very strong indicator of fairly recent (geologically speaking) common ancestry.
In the end, my own feeling is that many of the old indicators such as graft compatibility give a more accurate picture of how closely related these species are, until DNA testing says anything else.
-Lon Rombough
Grapes, writing, consulting, my book, The Grape Grower, at http://www.bunchgrapes.com  Winner of the Garden Writers Association "Best Talent in Writing" award for 2003.
On Feb 16, 2005, at 11:00 AM, Stephen Sadler wrote:

You're addressing a question I've long been curious about - what is the
relationship between genera Aronia, Pyrus, Sorbus, and Crataegus (and select
others)?  Aronia and Pyrus will graft; Pyrus and sorbus will cross; Aronia x
Prunifolia is classified in genera Crataegus, Mespilus, Photinia, and Pyrus,
depending on source; Crataegus, Sorbus, and Mespilus will cross...

I still await DNA testing for further definition.  As many of you know,
botanical species are classified by characteristics of the flowers, which
assumes a definitive correlation between genetics and floral
characteristics.  That assumption does often work out, but is not by any
means exact.  Fifteen years ago I was somewhat keeping track of efforts to
use genetic testing to reclassify plants.  The zoologists are certainly
making strides in genetic studies, but I haven't heard about botanical
reclassification in some time.  

News and comments appreciated... 

Stephen Sadler, Ph.D.
USDA 9, AHS heat zone 8, 
Sacramento CA - Mediterranean climate


-----Original Message-----
From: nafex-bounces@lists.ibiblio.org
[mailto:nafex-bounces@lists.ibiblio.org] On Behalf Of rob hamilton
Sent: Wednesday, February 16, 2005 4:34 AM
To: North American Fruit Explorers
Subject: Re: [NAFEX] aronia rootstock

I has anyone else used Aronia as a rootstock for
anything else? What is it comapatable with?




--- Doreen Howard <gardendiva@charter.net> wrote:

> I talked with the people at One Green World today,
> when they called to 
> confirm the shipping date of the dwarf Shipova I
> ordered.  I asked about the 
> aronia rootstock and if it effected the precocity of
> the tree.  They said 
> their experience is that Shipova on aronia bears
> fruit in 3-4 years.  The 
> person I talked with said that has been the
> experience with their grafts at 
> the nursery.   Does this sound reasonable to you
> experts, given that Shipova 
> normally doesn't bear until the 7th year or later?
> Doreen Howard 
>
>
> _______________________________________________
> nafex mailing list 
> nafex@lists.ibiblio.org
>
> **YOU MUST BE SUBSCRIBED TO POST!**
> All other messages are discarded.
> No exceptions.  
> ----
> To subscribe or unsubscribe, go to the bottom of
> this page (also can be used to change other email
> options):
> http://lists.ibiblio.org/mailman/listinfo/nafex
>
> File attachments are NOT stripped by this list
> TAKE STEPS TO PROTECT YOURSELF FROM COMPUTER
> VIRUSES!
> Please do not send binary files.
> Use plain text ONLY in emails!
>
> Message archives are here:
> https://lists.ibiblio.org/sympa/arc/nafex
>
> NAFEX web site:   http://www.nafex.org/


=====
--------------------------------------------
Zone 7a/b  Atlanta, GA

Atlanta Fruits Club
www.groups.yahoo.com/atlanta_fruits
North American Fruit Explorers (NAFEX)
www.NAFEX.org
Southern Fruit Fellowship (SFF)
www.NAFEX.org/SFF
Southeastern Palm and Exotic Plant Society (SPEPS)   www.SPEPS.net




__________________________________ 
Do you Yahoo!? 
The all-new My Yahoo! - Get yours free! 
http://my.yahoo.com 


_______________________________________________
nafex mailing list 
nafex@lists.ibiblio.org

**YOU MUST BE SUBSCRIBED TO POST!**
All other messages are discarded.
No exceptions.  
----
To subscribe or unsubscribe, go to the bottom of this page (also can be used
to change other email options):
http://lists.ibiblio.org/mailman/listinfo/nafex

File attachments are NOT stripped by this list
TAKE STEPS TO PROTECT YOURSELF FROM COMPUTER VIRUSES!
Please do not send binary files.
Use plain text ONLY in emails!

Message archives are here:
https://lists.ibiblio.org/sympa/arc/nafex

NAFEX web site:   http://www.nafex.org/



_______________________________________________
nafex mailing list 
nafex@lists.ibiblio.org

**YOU MUST BE SUBSCRIBED TO POST!**
All other messages are discarded.
No exceptions.  
----
To subscribe or unsubscribe, go to the bottom of this page (also can be used to change other email options):
http://lists.ibiblio.org/mailman/listinfo/nafex

File attachments are NOT stripped by this list
TAKE STEPS TO PROTECT YOURSELF FROM COMPUTER VIRUSES!
Please do not send binary files.
Use plain text ONLY in emails!

Message archives are here:
https://lists.ibiblio.org/sympa/arc/nafex

NAFEX web site:   http://www.nafex.org/