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Re: Synthetic hybrids

Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html

This is a common process in nature - two species cross and the result is
stable and able to breed on it's own so it becomes a new species that
combines the traits of the parents.  It happens naturally, or it can be done
by man.  For example, one species blooms and sets seed before a second one
even starts to open flowers.  Pollen can be collected from the first species
and held until the second one blooms, then applied to the second one, giving
offspring that are a combination of the two parents.  One natural  example
of the specific type mentioned in the article is the European plum (Prunus
domestica), represented by varieties such as "Italian", "Seneca", 'Valor",
etc.  A form of P. spinosa (sloe plum, the same one used to flavor gin)
crossed with P. cerasifera (the species that also gave the purple leaved
plum used so much as an ornament).  The hybrid was sterile, but since it was
a tree, it was long lived.  At some point it produced a limb in which the
chromosome number in the cells had doubled, which restored fertility.  The
one limb produced fruit with viable seed which grew into trees of the new
species.  The same parents have been crossed artificially and the seedlings
were treated to cause the chromosome number to double, and the results were
identical to natural P. domestica trees.
I'm sure this is clear as mud to some, but it would take several pages to
cover all the details.
-Lon Rombough
Grapes, unusual fruits, writing, more, at http://www.hevanet.com/lonrom

----------
>From: tom.boehme@pharma.Novartis.com
>To: sqft@listbot.com
>Subject: Synthetic hybrids
>Date: Fri, Jul 2, 1999, 9:26 AM
>

>Square Foot Gardening List - http://www.flinet.com/~gallus/sqft.html
>
>Hybrid or "recombinational" speciation refers to the origin of a new homoploid
>species via hybridization between
>chromosomally or genetically divergent parental species.
>
>I fetched this from a plant genetics? article
>(http://www.intl-pag.org/pag/7/abstracts/pag7070.html)
>What it means is they forced plants to cross that normally don't mix.
>Very much like mixing horses and donkeys to get mules.
>In pansy they are often looking for new colors or super sizing.
>
>Tom B
>
>
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