Re: Broken Colour
Now that is an ambitious study. I'd certainly look forward a to the
Plicata genetics still holds a lot of mysteries. There is still no idea
of how it produces the doting and stippling on edge in classic plicata.
While it could be a transposon with self repair that gives out in
later stages of cell division in flower, there is evidence that
something else is going on in central area of petals. Perhaps a
repression similar to the petunia study in central area of petal.
Sometimes plicata pattern is only with anthrocyanin , but there many
cases where it affects both cartenoid and anthocyanin, both with one to
one correspondence. So it is a cellular effect of some kind, rather
then just distribution of pigment as a regular transposon.
When dealing with the Puccini/Expose pattern you are adding both
anthocyanin enhancement plus "I" in interacting dosages, plus variagata
Then we have three alleles that we know of with plicata, and there is
no clarity of what exactly the luminata allele does. Is four dosages of
luminata a solid colour with a non coloured beard? Or what????
Then (based on what I have observed) there is likely to be some
pod/pollen differences in inheritance. Both with Anthocyanin Vascular
Intrusions and with effects of both cartenoids and anthocyanin
interactions as versus only anthocyanin inheritance of plicata
distribution. this means some extra nucleolus inheritance as well,
probably involving plastids.
So..., the samples to compare one to another would need to be selected
carefully. I would suspect that there would need to be many examples
to compare to each other. It will be a long project. Probably would
need to be broken down into smaller components.
Date: Sat, 27 Dec 2008 14:59:35 -0800 (PST)
From: Robin Shadlow <firstname.lastname@example.org>
Subject: Re: [iris] Re: Broken Colour
Anyone who is interested in unraveling more genetics may want to read
article on the petunia research that Kelly mentioned. Granted it is
technical, but if you slog through it slowly and look up the unfamiliar
on Wikipedia, it really does go through some of the most interesting
techniques being used.
Here"s the link:
So much gene expression occurs at the transcriptional level (DNA to
we know next to nothing about what is going on in irises. It doesn"t
easier that two very different alterations in the anthocyanin pathway
the same since the end result- no or inhibited anthocyanin is all we can
observe in the garden.
It does occur to me that doing sequencing analysis on a Broken Color
plicata breeding may be useful in locating (mapping) the plicata allele
itself. If we can locate this gene, it at least gives us a starting
so many things such as exploring where the difference is that gives
the Puccini/Expose pattern.
The most fun thing about doing sequencing may be selecting the
Zone 5 NE
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