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Puddy Tat w/ transposon

  • Subject: [PHOTO] [iris-photos] Puddy Tat w/ transposon
  • From: Dan Meckenstock dmeck@eaglecom.net
  • Date: Mon, 24 Apr 2006 09:34:10 -0500

We all know what Puddy Tat looks like, but here is a pic of Puddy Tat 
that suggests the purple spot is caused by a transposable element or 
jumping gene.  The white streak in the spot on the right fall is cause 
by a transposon that does not excise from the Chalcone Synthase gene 
(Chs), thus the cells remain white. When the transposable element 
excises perfectly (i.e., removes itself from the Chs gene), it turns the 
anthocyanin pathway on and color is produced.

In my previous pic (Puddy Tat x Scholar F1) segregation of progeny in 
this cross suggests Puddy Tat is recessive chs with a transposon. Since 
recessive chs is the same as the pla gene in irises, technically Puddy 
Tat is a glaciata with a transposon which is basically a plicata. The 
difference between Puddy Tat and plicatas is that Puddy Tat has a 
different transposon, one that excises earlier in the development of the 
flower than does the standard plicata gene.

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