I am curious about this as well. I have heard this used many times as a reason for decline of a variety through clones do to excessive asexual reproduction, but would be the mechanism for this "decline"? How can genetic "vigor" be "lost"? How can one "know" it is clonal breakdown and not environmental or pathanogenic? Alani Davis Tallahassee, Florida -----Original Message----- From: pbs-bounces@lists.ibiblio.org [mailto:pbs-bounces@lists.ibiblio.org] On Behalf Of John T Lonsdale Sent: Tuesday, November 21, 2006 2:26 PM To: 'Pacific Bulb Society' Subject: Re: [pbs] Lilies & virus John Bryan, Can you please explain what you mean by 'clonal breakdown'? How does TC of a lily suffering from 'clonal breakdown' fix this? Thanks. John T Lonsdale PhD 407 Edgewood Drive, Exton, Pennsylvania 19341, USA Home: 610 594 9232 Cell: 484 678 9856 Fax: 801 327 1266 Visit "Edgewood" - The Lonsdale Garden at http://www.edgewoodgardens.net/ USDA Zone 6b _______________________________________________ pbs mailing list pbs@lists.ibiblio.org http://www.pacificbulbsociety.org/list.php