Thanks for photo Donald. there are quite a few BC from crossed of
bearded to arils. The showing of irregular broken colour often happens
when two closely related species are crossed. Many examples have been
recorded in scientific literature.
What seems to happen is related to the fact that most plant genetic
material contains thousands of transposons. The vast majority
silenced, usually inactivated through a process called methalyization.
In crosses of related species often will allow some of these genes to
become activated. The ones dealing with colour pigment production in
flowers are most obvious.
This inactive genetic material was called "Junk" DNA for awhile, but is
now known to be genetic material containing part of the plants genetic
history of evolution. Genes that once had a function in history of
plant that is now turned off. This information is now used to determine
how plants are related based on genetic history. Plants genome are
compared to each other and by this process geneticists are able to
determine when plants diverged from a common ancestor.
Chuck Chapman
more broken color
Posted by: "Donald Eaves"
donald@eastland.net
d7432da
Sun Jan 4, 2009 9:48 am (PST)
The cross is GREENAN CA
STLE X TATAI PASHA. Broken color
shows up fairly
often in a TBxAB. I suppose the unbalanced chromosomes make for a bad
fit
resulting in the effect. This bloom also shows other characteristics
of the
type cross. The lines under the beard and the shriveled anther that
doesn't
produce pollen are typical results. Also, typically, it so far has
shown no
propensity for setting seeds. But the yellow dominance of TP over the
pinkish orange of the pod parent fits well with the discussion of
orange
inheritance over on IrisTalk. The end result does not really resemble
either parent and that is also the case most of the time.
Donald Eaves
donald@eastland.net
Texas Zone 7b, USA
