Lilies & virus

Jim McKenney
Tue, 21 Nov 2006 11:45:32 PST
While we're waiting for John Bryan's response on this, I'll add this. What
John Bryan called clonal breakdown might be what I think of as clonal drift.

Clonally propagated material varies over time, and the amount of variation
is probably proportional to the number of replications involved.

To keep a clonally propagated product within the expectations of consumers,
it's necessary periodically to reselect typical material on which to base
future cloning.  

This clonal drift is not necessarily a disadvantage. Many of the tulips of
the double early division are said to be somatic mutations of the tulip
Murillo, which itself is a somatic mutation of a single early tulip. So
where there was originally one product, there are now many, all pieces of
one original seedling. 

Jim McKenney
Montgomery County, Maryland, USA, USDA zone 7
My Virtual Maryland Garden
Webmaster Potomac Valley Chapter, NARGS 
Editor PVC Bulletin 
Webmaster Potomac Lily Society

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