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[no subject]

  • Subject: [iris-photos]
  • From: "irischap" irischapman@netscape.net
  • Date: Thu, 03 Feb 2005 16:28:40 -0000
  • Re: Hyb: Umbrata pattern & yellow plicata

I've sent this about 4 times. Hopefully it will go this time

 Some information of note follows. This was published after the World
of Iris was published   so probably got ignored. Dr. Henderson was a
Biology profesor who puzzled over pigments and patterns for over 30
years. The spot theory was also proposed by Walter Welch and he had
some good test data to back what he was saying.

Chuck Chapman

Henderson, Norland "Color-Patterns in the Tall-Bearded Iris" BAIS #241
April 1981

"Iris variegata, a light yellow iris species from Europe has maroon
veining on the falls that spreads in some forms to produce a maroon
spot covering the entire blade except for a narrow yellow margin. This
spot of deep blue-violet is an overlay since it is restricted to the
cells of the upper epidermis. It was discovered that this dominant
deep blue-violet could also be added to a recessive white or a light
blue-violet flower. If the ground color is white , the flower has
white standards and deep blue-violet falls with a white margin. If the
ground color is light blue, the standards are light blue-violet and
the falls are deeper blue-violet with a lighter margin. This
particular pattern carries its own concentration of pigment and does
not alter the other pigments that might be present at all. However, if
an iris carrying this   gene is crossed to an inhibited white, the
spot will also be inhibited and thus will not appear. Since this gene
came from I. variagata , it should be designated the "Variegata-pattern.""

Chuck Chapman


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