Stability of tetraploid Siberians
- Subject: [sibrob] Stability of tetraploid Siberians
- From: "dunlopjj" d*@aol.com
- Date: Sun, 01 Dec 2002 00:25:38 -0000
Greetings to all. Recently I've been thinking about the stability
of tetraploid germplasm in Siberians. My considered opinion is that
even converted material (P1) used with stable tets, should produce
stable tet pollen and pods in the P2 generation and beyond. Assuming
of course, the P1 cross took as tetraploid without reversion
(reversion giving no seeds or nonviable seeds), or without altering
the P1 cross progeny to another state of ploidy (to triploid,
octoploid, etc). Can we count on tetraploids in the P2, P3 and
higher being very stable? Also does anyone have a grip on
statistical probabilities of reversion or alteration in ploidy level
in the P2 or beyond? Thanks for your help.
Jeff Dunlop
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