I'm wondering if the appearance of red spots on a couple blossoms on
a dark orange clivia with no known group 2 yellow parentage is
significant? This is the second bloom for this plant and the same
thing happened last summer, the first time it bloomed. (Most of my
plants bloom in July in Ohio.) I searched this list's past messages
and found the suggestion that red spots on some group 2 yellows
could have been caused by botrytis rather than genetics. Should I be
concerned?

Robin in muggy Yellow Springs, Ohio

-------- Original Message --------
Subject: Re: [clivia] red spots on Group 2 yellow flowers
Date: Fri, 11 Nov 2005 12:20:03 +0200
From: Mick Dower <jdower@...>
Reply-To: clivia-enthusiast@yahoogroups.com
To: clivia-enthusiast@yahoogroups.com
CC: Sean Chubb <terric@...>

During September/October there was a discussion on red spots on
Group 2 Yellow flowers. I had mentioned that the flowers of all 4 of
the Transkei Group 2 yellows I have colour red where and as soon as
they are damaged by rain or a pinprick. Rudo Lotter had notices such
marking on older Howick Yellow seed pods which Harold Koopowitz
thought was caused by botrytis. We had no information on the other
Natal Group 2 yellows and Ben Zonneveld suggested that they be
damaged by cutting rather than pinpricks to make sure it was not
botrytis. The Natal Group 2 yellows flower at the end of the miniata
season. I have damaged the flowers of three different ones - Giddy
Natal Yellow, Holl Yellow (the different yellow with which the late
Fred Gibello won best yellow on show at the first International
Clivia Show in 1994) and "Cynthia's Best". I cut into their flowers
and none of them developed any red marking. This showed for me a
total absence of anthocyanin as in the Group 1's. I will test a
Trankei Group 2 x Natal Group 2 hybrid (which are of course all
yellow) next season. Can Ben and Harold please explain the genetics
to us please. Presumably all these Group 2's produce yellow
offspring whichever two of them are crossed because the pair of
mutated genes which blocks the anthocyanin pathway is situate at the
same locus (but a different locus from the Group 1's) on their
chromosome and on meiosis recombine at that same locus. But the
Transkei Group 2's are clearly different - how do they produce
anthocyanin?

Mick Dower, Cape Town.
----- Original Message -----
From: "zonneveld" <Zonneveld@...>
To: <clivia-enthusiast@yahoogroups.com>
Cc: "Sean Chubb" <terric@...>
Sent: Thursday, October 13, 2005 3:53 PM
Subject: Re: [clivia] red spots on Group 2 yellow flowers


> If you make red spots on your group 2 yellows I suggests you dont
> prick but make a stripe to make sure it is not Botrytis giving
mostly
> a nice round spot.