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Re: HYB: Complementary White Carotenoid Genes in SDB

  • Subject: Re: HYB: Complementary White Carotenoid Genes in SDB
  • From: irischapman@aim.com
  • Date: Sat, 11 Nov 2006 15:55:33 -0500

Re: HYB: Complementary White Carotenoid Genes in SDB

What you have here is the background colour of Buddy Boy with
anthocyanin removed by four dosages of Recessive Reduction of
anthocyanin. It has four dosages of tangerine gene, tttt

Songline is a tttt plant from a cross of a pink (Blissed Out) by a a
plant that probably looked a lot like Buddy Boy, a sib to Rumours, and
both of its parents had tttt genes. Basically Songline would be a
white with red beards (allthough not an intense beard) if it didn't
have anthocyanin. This removal of pink from a tangerine plant is a
recessive, and seen in all red bearded red plants. When crossed to a
pink or tttt plant, will give all pink plants (unless it has some of
the genes that remove the _expression_ of pink).

Buddy Boy is a combination of pink and delphinidin, thus its rosy
colour. When it blooms next year, you can test this by boiling a petal
in water until the anthocyanin is removed, and the petal will be the
same colour as your seedling. I'm assuming Buddy boy is tttt, baed on
what I know, it may only be Tttt, but not less then 3 ts based on its

As to the recessive reduction of anthocyanin genes, look at parentage.
Blyth works a lot with RRA, and Buddy Boy has many of Blyth plants on
both sides of its parentage, and of course, Songline is pure Blyth.

Thus 1/4 of the offspring from Songline X Buddy Boy will have a full
set of RRA genes, and no anthocyanin, or actually, much reduced

While Buddy Boy could carry some plicata genes, it is not clear how
many dosages it may have.

If you notice, on you pic of the seedling there is a bit of blue at
the end of the beard, and touches of blue at the hafts, showing in the
veining. These are not usually seen in glaciatas, and it just does not
have a glaciata look. You could test for sure by crossing seedling to
a plicata to see if you get all plicata from the cross, but be sure it
is not one of Blyths licatas carrying RRA genes, as this will confuse
the results.

I have done a lot of work on these sets of genes and there are a lot
of secrets to tell, but this result is easily explained.

Chuck Chapman

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