Plants of hybrid origin

J.E. Shields
Tue, 15 Jun 2010 05:32:30 PDT
This is another very interesting discussion.  I'm a bit weak on the 
official nomenclatural rules, but as to differentiating between hybrids and 
species, let me offer some suggestions.

DNA sequencing provides the ultimate datum, but it is very hard to come by 
unless you have a big chunk of funding at your disposal.

A less expensive approach (but still not free) is what Ben Zonneveld does: 
Flow cytometry  "weighs" the DNA in the cell nucleus.  Often (but not 
always) the DNA amounts differ enough between species that one can 
distinguish species A from species B and even (if we are really in luck) 
from the hybrid AxB or BxA.

Biologically, if you are interested in analyzing that particular 
population, take some cuttings from representative plants and grow them 
where you can control the pollination.  See if they are 
self-fertile.  Raise some of the wild-collected seed to mature plants (if 
you have plenty of space) and compare them to each other as well as to the 
parent plants.

Have fun!

Jim Shields
in warm and rainy Westfield, Indiana

Jim Shields             USDA Zone 5             Shields Gardens, Ltd.
P.O. Box 92              WWW:
Westfield, Indiana 46074, USA
Tel. ++1-317-867-3344     or      toll-free 1-866-449-3344 in USA

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