HYB: Complementary White Carotenoid Genes in SDB
- Subject: HYB: Complementary White Carotenoid Genes in SDB
- From: "* M* <d*@eaglecom.net>
- Date: Mon, 6 Nov 2006 10:59:22 -0600
|
I am talking about the carotenoid pathway. I think
I have found two of the elusive complementary white carotenoid genes in the SDB
background. In other words, two non-carotenoid pigmented flowers when crossed
produce a colored carotenoid flower. The genes were found in the
cross.
Songlines x Buddy Boy = pale orange F1, with no
anthocyanidins
In fact, two of 11 seedlings were pale orange. Needless to say, I was
surprised to see these two segregates. A photo of one of the pale orange
seedlings is attached. It is identified as 06 SDB 1297. This flower is
heterozygous at two of the white carotenoid loci and should produce white
offsping if self-polinated. This is a test cross I need to do. This flower
should also be homozygous pl--a condition that blocks the anthocyanin
pathway.
The female parent, Songlines, is a blue plicata
with no carotenoid pigmentation, Sorry about the focus.
The male parent, Buddy Boy, is a blue flower with
red hafts. I need to check this next year with the microscope, but I believe the
red hafts are caused by yellow chromoplasts, but the falls are void of colored
chromoplasts.
There is a lot of heterozygosity in this cross. For
example, for a pale orange F1 flower with no anthocyanidins to appear, Buddy Boy
has to be at least pl pl - -. This also suggest blue is a heterozygous white
condition, but I do not have sufficient evidence to prove this
statement.
I have other crosses that indicate color in the
hafts and falls inherit independently. I therefore make the assumption the hafts
and falls are different genetic domains. As such, the white carotenoid genes I
have serendipitously discovered function in the domain of the standards and
falls.
Regards
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