Re: HYB: heritable traits

Although I haven't put it to the test, I would suspect pod parent to have more influence on hardiness traits . This is because plastids, (and this includes chloroplast as well as chromoplasts) are maternally inherited. Plastids are under control of nucleolus genes, so there can at times be a communication problem, so some individual crosses may not let plastids reach full potential. 

Chuck Chapman


Date: Wed, 11 Mar 2009 17:45:02 -0500

From: Linda Mann <lmann@lock-net.com>

Subject: [iris] Re: HYB: heritable traits (from photos)



Donald, my experience has been similar to both yours (no apparent

pattern) and Mary Lou's (strong parents give strong seedlings).



Some strong parents give strong seedlings, some don't.  I figure there

is a suite of heritable traits that add up to a strong plant, seems like

some act as a dosage effect, with all factors adding together, others

plus or minus (not dosage).   In other words all weaknesses recessive.



Explains why some crosses using strong parents give strong seedlings,

others don't.  I wish there were some way to know how strong the cross

was in general when picking parents - maybe if all sibs from the cross

were strong, then the strong seedlings might be carrying fewer recessive

weakness genes.  If that makes any sense at all, physiologically and

morphologically.

- --

Linda Mann east Tennessee USA zone 7/8

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