Re: HYB: reselects and crosses
- To: i*@egroups.com
- Subject: Re: HYB: reselects and crosses
- From: i*@netscape.net
- Date: Fri, 12 May 2000 02:30:51 -0000
--- In iris-talk@egroups.com, Chad Schroter <chad.schroter@q...>
wrote:
> This past weekend I was at the garden of a well-known
hybridizer. In
> touring we saw a seedling which had a form improvement for the color
> class(black) but seemed to lack vigor and exhibited poor bud
count/missing
> bottom branch. I am curious as to what approach breeders prefer
(and
the
> relative merits of each) when trying to improve on such a
situation.
These
> are what come to mind, in random order:
>
> 1) Repeat the original cross.
> 2) Outcross to 'unrelated' iris in same color with better
vigor/branching.
> 3) Backcross to original parent(s) with better vigor/branching.
> 4) Intercross with another sibling that shows best form/color with
> vigor/branching.
> 5) Cross with best available iris (in color) with some similarity in
> parentage.
> 6) Compost this before you waste too much time/effort.
>
> I have gotten the idea that lack of vigor etc. can be caused
by
> 'inbreeding' and only outcrossing can cure this ?
>
> Chad Schroter
> Los Gatos CA Zone 9
> still got bloom !!!!
-Another method is to select the best two siblings that are closest
in
color with the best overall features and cross them to each other.
Sometimes this doesn't include the one that first caught your eye.
-Another choice is to find the seedling from the same cross that has
the best features where the chosen one is weakest, regardless of
color. The genetics are usually there unless it was a wild or wide
original cross and subsequent sib to sib.
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