[NAFEX] It doesn't take a genus to see that there must be some relationship...
lreich at hvc.rr.com
Thu Feb 17 07:23:34 EST 2005
Actually, in a graft hybrid, the cells do not fuse. These "hybrids", or
chimeras, as they are also called, arise when adventitious buds at the
graft union grow so that the resulting shoot combines the characters of
both individuals. Two, genetically different cells make up the
meristem, or growing point. Chimeras, incidentally, are one possible
explanation for the anomalies in males and femaleness of che trees.
On Feb 17, 2005, at 12:28 AM, Lon Rombough wrote:
> There is also a Pyrus x Cydonia, aka Pyronia, which is a "graft
> hybrid" of pear and quince. The theory is that in very rare cases,
> tissues of the stock and scion are in contact in such a way that cells
> fuse to make a sort of physical (as opposed to sexual) hybrid of the
> two species, AND the fused cells are in the right place to grow into a
> shoot that shows the traits of both "parents". Apparently there were
> serious research attempts to cause such hybrids to form these "graft
> hybrids" by grafting plants, then cutting them off at the union in an
> attempt to force hybrid shoots from the callus union.
> I have the Crataegomespilus hybrid (or one such) and it does show
> traits of both hawthorn and medlar.
> -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 6:02 PM, John Smith wrote:
> I was pondering Stephen Sadler's information and
> looking some things up, when I discovered there is
> apparently a +Crataegomespilus which is a hybrid
> between hawthorn and a medlar that was created by
> grafting, not hybrid created by a sexual cross. I had
> no idea a graft could take on characteristics of both
> parents... I always thought the scion would maintain
> it's separate genetics, but I guess that's not always
> the case. I wonder how common this
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