Re:Re: Broken Colour
This is an interesting question, but I can only guess at answer.
I had very similar BC iris to yours from a cross of two plicata,
neither displaying no BC in either parent. I had 3-4 plants showing
same light and dark streaks on a plicata ground of mid vlt plicata.
It is common in BC of plicata origin to display lighter and darker
streaks then the background plicata anthocyanin. Batik is a good
example of this. Plicata cultivars have anthocyanin, but distribution
of anthocyanin is under control of plicata genes. Perhaps other control
genes as well. In your seedling, as in most plicata based BC, the
anthocyanin is distributed in center of falls and not just around
edges as in the classic plicata pattern. The plicata allele most
responsible for distribution in center of petals is the luminata gene.
In addition I suspect that the variegata spot gene also plays a part. I
say this as the examples of the same pattern I got was from a cross of
Ring Around Rosie ( with variegata spot) crossed with Understudy,
having lumianta genes. So both or either factor could have plaayed a
role in my results.
Remember that the transposon responsible for BC in plicata based BC can
be in either anthcyanin producing gene or a control gene. In this case
with lighter and darker streaks, it would likely be in a control gene.
thus it could be in any of the plicata genes (luminata would be a
suspect) or in variagata spot gene complex.
Of note is that the transposon responsible for BC is an unstable
genetic structure. it can be moved from one gene to another over time,
so not all BC plants will have the controlling transposon in the same
gene. In BC that are not in plicata based plants will be much more
predictable in their effect.
Date: Fri, 26 Dec 2008 07:12:15 -0500
Subject: Re: [iris] Re: Broken Colour
I probably should stay out of this discussion since I know nothing
about broken color genes, but . . .
My bc child varies spots from one flower to another.? Talk about
jumping!??Are 'jumping gene' and 'unstable gene' just variations of the
Of note, this particular seedling (1809-02) has both white splashes and
darker purple splashes.? This seems like a more complicated occurance
of the transposon?? Or do I just not grow enough bc irises to have seen
<< transposon. This is sometimes called a jumping gene,>>
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